WO2017039203A1 - 비동기 시리얼 통신을 위한 반도체 장치 및 컨트롤러와 비동기 시리얼 통신 방법 및 시스템 - Google Patents
비동기 시리얼 통신을 위한 반도체 장치 및 컨트롤러와 비동기 시리얼 통신 방법 및 시스템 Download PDFInfo
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06K—GRAPHICAL DATA READING; PRESENTATION OF DATA; RECORD CARRIERS; HANDLING RECORD CARRIERS
- G06K19/00—Record carriers for use with machines and with at least a part designed to carry digital markings
- G06K19/06—Record carriers for use with machines and with at least a part designed to carry digital markings characterised by the kind of the digital marking, e.g. shape, nature, code
- G06K19/067—Record carriers with conductive marks, printed circuits or semiconductor circuit elements, e.g. credit or identity cards also with resonating or responding marks without active components
- G06K19/07—Record carriers with conductive marks, printed circuits or semiconductor circuit elements, e.g. credit or identity cards also with resonating or responding marks without active components with integrated circuit chips
- G06K19/0701—Record carriers with conductive marks, printed circuits or semiconductor circuit elements, e.g. credit or identity cards also with resonating or responding marks without active components with integrated circuit chips at least one of the integrated circuit chips comprising an arrangement for power management
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- G—PHYSICS
- G11—INFORMATION STORAGE
- G11C—STATIC STORES
- G11C5/00—Details of stores covered by group G11C11/00
- G11C5/06—Arrangements for interconnecting storage elements electrically, e.g. by wiring
- G11C5/066—Means for reducing external access-lines for a semiconductor memory clip, e.g. by multiplexing at least address and data signals
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06K—GRAPHICAL DATA READING; PRESENTATION OF DATA; RECORD CARRIERS; HANDLING RECORD CARRIERS
- G06K19/00—Record carriers for use with machines and with at least a part designed to carry digital markings
- G06K19/06—Record carriers for use with machines and with at least a part designed to carry digital markings characterised by the kind of the digital marking, e.g. shape, nature, code
- G06K19/067—Record carriers with conductive marks, printed circuits or semiconductor circuit elements, e.g. credit or identity cards also with resonating or responding marks without active components
- G06K19/07—Record carriers with conductive marks, printed circuits or semiconductor circuit elements, e.g. credit or identity cards also with resonating or responding marks without active components with integrated circuit chips
- G06K19/0716—Record carriers with conductive marks, printed circuits or semiconductor circuit elements, e.g. credit or identity cards also with resonating or responding marks without active components with integrated circuit chips at least one of the integrated circuit chips comprising a sensor or an interface to a sensor
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- G—PHYSICS
- G11—INFORMATION STORAGE
- G11C—STATIC STORES
- G11C7/00—Arrangements for writing information into, or reading information out from, a digital store
- G11C7/10—Input/output [I/O] data interface arrangements, e.g. I/O data control circuits, I/O data buffers
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- G—PHYSICS
- G11—INFORMATION STORAGE
- G11C—STATIC STORES
- G11C7/00—Arrangements for writing information into, or reading information out from, a digital store
- G11C7/22—Read-write [R-W] timing or clocking circuits; Read-write [R-W] control signal generators or management
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- G—PHYSICS
- G08—SIGNALLING
- G08C—TRANSMISSION SYSTEMS FOR MEASURED VALUES, CONTROL OR SIMILAR SIGNALS
- G08C19/00—Electric signal transmission systems
- G08C19/16—Electric signal transmission systems in which transmission is by pulses
- G08C19/28—Electric signal transmission systems in which transmission is by pulses using pulse code
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- G—PHYSICS
- G11—INFORMATION STORAGE
- G11C—STATIC STORES
- G11C7/00—Arrangements for writing information into, or reading information out from, a digital store
- G11C7/10—Input/output [I/O] data interface arrangements, e.g. I/O data control circuits, I/O data buffers
- G11C7/1051—Data output circuits, e.g. read-out amplifiers, data output buffers, data output registers, data output level conversion circuits
- G11C7/1057—Data output buffers, e.g. comprising level conversion circuits, circuits for adapting load
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- G—PHYSICS
- G11—INFORMATION STORAGE
- G11C—STATIC STORES
- G11C7/00—Arrangements for writing information into, or reading information out from, a digital store
- G11C7/10—Input/output [I/O] data interface arrangements, e.g. I/O data control circuits, I/O data buffers
- G11C7/1051—Data output circuits, e.g. read-out amplifiers, data output buffers, data output registers, data output level conversion circuits
- G11C7/1066—Output synchronization
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- G—PHYSICS
- G11—INFORMATION STORAGE
- G11C—STATIC STORES
- G11C7/00—Arrangements for writing information into, or reading information out from, a digital store
- G11C7/10—Input/output [I/O] data interface arrangements, e.g. I/O data control circuits, I/O data buffers
- G11C7/1078—Data input circuits, e.g. write amplifiers, data input buffers, data input registers, data input level conversion circuits
- G11C7/1084—Data input buffers, e.g. comprising level conversion circuits, circuits for adapting load
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- G—PHYSICS
- G11—INFORMATION STORAGE
- G11C—STATIC STORES
- G11C7/00—Arrangements for writing information into, or reading information out from, a digital store
- G11C7/10—Input/output [I/O] data interface arrangements, e.g. I/O data control circuits, I/O data buffers
- G11C7/1078—Data input circuits, e.g. write amplifiers, data input buffers, data input registers, data input level conversion circuits
- G11C7/1093—Input synchronization
Definitions
- the present invention relates to asynchronous serial communication, and more particularly, to a semiconductor device for asynchronous serial communication, and an asynchronous serial communication method and system for performing asynchronous serial communication for writing and reading data.
- the semiconductor device may be manufactured by applying various semiconductor technologies depending on the use.
- semiconductor devices such as semiconductor memories and system integrated circuits are manufactured by applying semiconductor technology to satisfy high performance and high integration. In this case, the manufacturing cost of the semiconductor device is high.
- Semiconductor devices in the field of sensors such as medical disposable sensors and security chips, do not require high performance circuitry, low power consumption, small size, and simple contact with external systems.
- the price competitiveness of the semiconductor device used as a sensor is important.
- the semiconductor device used as a sensor has a simple structure, can guarantee a high transmission speed, and needs to have various applications.
- An object of the present invention is to implement a semiconductor device having two terminals in which one terminal is shared for data communication and power supply.
- Another object of the present invention is to implement a semiconductor device having a rectifying function for obtaining a power supply voltage from data.
- Another object of the present invention is to implement a technique capable of writing and reading data through one pin by an asynchronous serial communication method.
- a technique for transferring the data information generated in the interior of the semiconductor device to an external controller is another object of the present invention.
- Another object of the present invention is to implement a controller for transferring data using pulses of short intervals and a semiconductor device for normally restoring data transmitted using pulses of short intervals in order to increase the efficiency of the rectification function using data.
- the purpose of the present invention is to implement an asynchronous serial communication technology that can improve the error of data transfer process.
- Another object of the present invention is to implement a technique for performing asynchronous serial communication and determining a read mode and a write mode according to code information included in data.
- Another object of the present invention is to implement a technique for generating a timing for determining a high or low state of data input in an asynchronous serial mode in a write mode using a baud time interval of data.
- Another object of the present invention is to generate a clock signal corresponding to a baud time interval when the data transmitted from the outside includes a code indicating a read mode, and uses the clock signal to generate an internal data forming unit ( Sensing internal data from a sensor array formed by using a CMOS device and a memory device) and transferring the sensed data to an output buffer to perform data communication with an external controller. After reading all the data, it implements the technique of returning to the write mode.
- an internal data forming unit Sensing internal data from a sensor array formed by using a CMOS device and a memory device
- Still another object of the present invention is to generate an output of a semiconductor device having two terminals in synchronization with a reference pulse signal sent from an external controller in read mode, and output the output of the semiconductor device having two terminals to an external controller.
- the present invention is to implement a technique for performing the alternate operation of transmitting.
- Still another object of the present invention is to implement a technique in which one terminal selected from two terminals of a semiconductor device is shared for data communication and power supply according to a mode.
- a semiconductor device of the present invention includes: a first terminal and a second terminal on a substrate; A rectifier circuit comprising a diode and a first capacitor; And a CMOS device, wherein any one of the first terminal and the second terminal is connected to a contact for inputting and outputting data of the CMOS device and simultaneously connected to the rectifier circuit, the power being charged in the first capacitor It is operated using, and the input and output of the data is characterized in that to use a pulse signal synchronized to the data transition time in order to increase the efficiency of power supply.
- the semiconductor device may be configured such that an element array including at least one sensor element or a memory element corresponds to a sensing surface, and includes a circuit for processing the data generated on the sensing surface.
- the semiconductor device of the present invention comprises: an input buffer for recognizing a pulse signal synchronized with a transition point of an actual signal provided from the outside through one input / output line; A pulse signal recovery circuit for recovering the recognized pulse signal to the actual signal; A command decoder for recognizing the recovered signal as data; An address providing unit for providing an address to be written in response to a write mode according to the control of the command decoder; And an element array including at least one of a sensor element and a memory element for writing the data to the address.
- the semiconductor device of the present invention comprises: an input buffer for recognizing a pulse signal provided from the outside through one input / output line; A pulse signal recovery circuit for recovering the recognized pulse signal to an actual signal; A command decoder that recognizes a read mode code of the recovered signal and provides a read command; An address providing unit providing an address to read in response to the read mode; An element array configured to provide the data in response to the read command and the designated address; An analog to digital converter for converting an analog signal output from the device array into a digital signal; A first in first out (FIFO) memory for sequentially storing and outputting data of a predetermined size output from the analog-to-digital converter; And an output buffer for outputting data of the captured memory through the input / output line.
- FIFO first in first out
- the controller of the present invention comprises: a voltage regulator for generating and providing a voltage for operation of a semiconductor device having two terminals; A command decoder for providing data corresponding to an external transmission signal; A baud rate generator for generating capture timing of data provided by the semiconductor device having the two pins; A pulse signal generator for providing a pulse signal for loading the data of the command decoder in accordance with the capture timing on one input / output line; An output buffer configured to output the pulse signal of the pulse signal generator to the semiconductor device through the one input / output line using the voltage of the voltage regulator; An input buffer configured to receive a signal input from the semiconductor device through the one input / output line; And a converter for changing the signal of the input buffer into a data format that can be recognized by an external device.
- an oscillation signal that recognizes a pulse width of the first bit among a plurality of data bits subsequent to the first bit and the first bit transmitted by the asynchronous serial communication method using a ring oscillator. Generating a; Generating a capture signal based on a transition time of the oscillation signal; And capturing the data bits using either the rising edge or the falling edge of the capture signal.
- An asynchronous serial communication system of the present invention comprises: a controller having a first output buffer and a first input buffer sharing one input / output line; And a semiconductor device having a second output buffer and a second input buffer sharing the one input / output line, the semiconductor device including a capacitor charging power and a diode transferring data of the input / output line to the capacitor.
- the first output buffer remains on and the second output buffer remains off, and the data is transferred to the capacitor through the diode while The first output buffer is transferred to a second input buffer, and when the data is read from the semiconductor device to the controller, the first output buffer is turned off while the second output buffer is turned on.
- the asynchronous serial communication system of the present invention controls the pull-up and pull-down of the input and output lines, the transition of the transmission signal transmitted from the outside while swinging between the input and output reference voltage for controlling the pull-up and the reference voltage for controlling the pull-down
- a controller for outputting a pulse signal corresponding to a viewpoint to the input / output line;
- a semiconductor device configured to perform a charge and write mode using a signal of the input / output line including the pulse signal.
- the controller of the present invention includes a pulse generator for generating a pulse corresponding to a transition time of the transmission signal when a transmission signal is input from the outside; An input / output voltage regulator for holding the pull-up such that an input / output line maintains a preset input / output reference voltage; And a pull-down controller configured to pull down the input / output line in response to a pulse signal of the pulse generator, wherein the pull-down stops when the voltage of the input / output line reaches a preset reference voltage. The voltage level of the line is returned by the pull-up and outputs the pulse signal swinging by the pull-up and the pull-down to the input / output line in response to the transmission signal.
- the semiconductor device of the present invention receives a pulse signal swinging between first and second voltages set in advance corresponding to a transition time of a transmission signal transmitted from the outside from a controller through an input / output line, and compares the pulse signal with a preset comparison.
- An input buffer for providing a signal corresponding to the difference between the pulse signal and the comparison voltage in comparison with the voltage;
- a pulse generation circuit for outputting a pulse having a transition point synchronized with the output of the input buffer;
- a toggle flip-flop for restoring data having the same phase as the transmission signal by using the pulse.
- the controller of the present invention includes an input / output voltage regulator for holding a pull-up such that the input / output line maintains the input / output reference voltage or more;
- a pull-down control unit configured to perform the pull-down of the input-output line in response to a read command and to terminate the pull-down when the pull-down signal of the input-output line reaches a preset reference voltage;
- a pulse generation circuit configured to generate a constant pulse having an enable period having a predetermined width when the pull-down signal of the input / output line reaches the reference voltage;
- a first transistor configured to disconnect the connection between the input / output line and the input / output voltage regulator and to float the input / output line during the enable period of the constant pulse. It is characterized by outputting the sensing.
- the asynchronous serial communication system of the present invention controls pull-up and pull-down of an input / output line, swings between an input-output reference voltage for controlling the pull-up and a reference voltage for controlling the pull-down, and transmits a transmission signal or lead transmitted from the outside.
- a controller configured to float the input / output line during the enable period of the first constant pulse, and to sense and output the data when data is transmitted to the floated input / output line; And a charging and a writing mode using the pulse signal, generating a second constant pulse when the pull-down signal of the input / output line reaches the reference voltage in response to the read command, and generating the read data.
- a semiconductor device configured to output through the input / output line during the enable period of the constant pulse.
- Another implementation of the asynchronous serial communication system of the present invention controls the pull-up and pull-down of the input and output lines, swinging between the reference voltage for controlling the pull-up and the input and output reference voltage for controlling the pull-down and transmitting from the outside
- Outputs a pulse signal corresponding to the transition time of the transmitted signal or read command to the input / output line, performs the pull-up in response to the read command, and when the pull-up signal of the input / output line reaches the reference voltage
- a controller configured to generate a stunt pulse and end the pull-up, plot the input / output line during an enable period of the first constant pulse, and sense and output the data when data is transmitted to the floated input / output line; And a charging and a writing mode using the pulse signal, generating a second constant pulse when the pull-up signal of the input / output line reaches the reference voltage in response to the read command, and generating the read data.
- a semiconductor device configured to output through the input / output line during the enable period of the constant
- the controller of the present invention includes: a first mode switch turned on in response to the first switching mode; And a second mode switch turning on in response to the second switching mode; Controlling pull-up and pull-down of the input / output line in response to the turn-on of the first mode switch, and swinging between a first input-output reference voltage for controlling the pull-up and a first reference voltage for controlling the pull-down and transmitted from the outside; Outputs a first pulse signal corresponding to a first transmission signal or a transition point of a read command to the input / output line, performs the pulldown in response to the read command, and when the pull-down signal of the input / output line reaches the first reference voltage Generating a constant pulse, plotting the input / output line during the enable period of the constant pulse, and sensing and outputting the data when data is transferred to the floated input / output line; In response to the turn-on of the second mode switch, the pull-up and the pull-down of the input / output line are controlled, and a swing
- An oscillator for generating an oscillation signal for recognizing data transmitted by the asynchronous serial communication method of the present invention is characterized in that the first bit of one bit transmitted by the asynchronous serial communication method and a plurality of data bits subsequent to the one bit.
- a plurality of delay circuits connected in series wherein the delay circuit comprises: a delay line and a first traveling switch configured to advance the delay signal in a forward direction along a forward line; A second traveling switch for returning the delay signal in a backward direction along a backward line; A pass switch transferring the delay signal from the forward line to the backward line; And a set state is determined in response to a signal corresponding to the pulse width of the first bit and the delay signal, and controls swinging of the first and second traveling switches and the pass switch with outputs corresponding to the set state.
- a latch wherein the delay signal progresses in a forward direction through the delay line of the one or more delay circuits and the first forward switch after the start point of the first bit, and at the end point of the first bit.
- the delay signal is transmitted to the backward line through the pass switch of the specific delay circuit, and the delay signal transmitted to the backward line is returned to the NOR gate through the second traveling switch of the delay circuits.
- the NOR gate generates an oscillation signal by inverting the signal in response to the return of the delay signal. It shall be.
- the present invention can implement a semiconductor device having two terminals, and the semiconductor device can share one terminal for communication and power of data. Therefore, the semiconductor device can perform asynchronous serial communication. That is, the semiconductor device may write and read data using one shared terminal.
- the semiconductor device may have a rectifying function for obtaining a power supply voltage from data.
- a semiconductor device having two terminals may generate a reference clock for asynchronous serial communication, thereby implementing writing of data using the reference clock.
- the present invention can stably transfer data information generated inside the semiconductor device to an external controller by minimizing energy loss and size of the internal circuit.
- the present invention can transmit data using the pulse of the short interval
- the controller can restore the data transmitted using the pulse of the short interval, it is possible to increase the efficiency of the rectification function using the data
- Asynchronous serial communication technology can be implemented to improve the error of data transfer process.
- the present invention may determine the read mode and the write mode according to code information included in the data.
- the present invention may generate timing for determining a high or low state of data input in an asynchronous serial mode in a write mode using a data transmission time interval.
- a semiconductor device when the data includes a code indicating a read mode, a semiconductor device having two terminals generates a clock signal corresponding to a transmission time interval and forms internal data using the clock signal.
- Data may be received from the unit (element array including at least one memory element or sensor element), and the data may be returned to the write mode after receiving the data.
- the present invention may generate an output of the semiconductor device in synchronization with a reference pulse signal sent from an external controller, and sense and determine the output of the semiconductor device by an external controller.
- the present invention alternately transfers data from the data provider to the output buffer and transfers data from the output buffer to the outside, thereby reducing the size of the output buffer required by the semiconductor device. Can be.
- one terminal selected from two terminals of the semiconductor device may be shared for data communication and a power supply according to a mode, thereby enabling various applications of the semiconductor device.
- FIG. 1 is a perspective view showing an embodiment of a semiconductor device of the present invention.
- FIG. 2 is a schematic diagram illustrating a cross section and a planar structure of the semiconductor device of FIG. 1.
- FIG. 2 is a schematic diagram illustrating a cross section and a planar structure of the semiconductor device of FIG. 1.
- FIG. 3 is a block diagram showing an embodiment of a semiconductor device of the present invention.
- FIG. 4 is a view for explaining the action of the CNT resistance in the embodiment of the semiconductor device of the present invention.
- FIG. 5 is a block diagram illustrating an embodiment of an asynchronous serial communication system of the present invention.
- FIG. 6 is a waveform diagram illustrating a data reception method using a fixed delay.
- FIG. 7 is a block diagram illustrating an oscillator for applying a variable delay.
- FIG. 8 is a detailed circuit diagram illustrating the delay circuit of FIG. 7.
- FIG. 9 is a timing chart illustrating a method of measuring a pulse width of a start bit to create timing for data recognition.
- FIG. 10 is a timing chart illustrating a method of making timing for data recognition by varying a pulse width of a row section of a start bit.
- FIG. 11 is a diagram for explaining a write and read operation between a controller and a semiconductor device
- FIG. 12 is a circuit diagram for describing communication between a controller and a semiconductor device during a write operation.
- FIG. 13 is a circuit diagram of applying an error prevention circuit to the circuit of FIG. 12.
- FIG. 14 is a circuit diagram for describing communication between a controller and a semiconductor device during read.
- 15 is a waveform diagram illustrating a protocol for a transmission signal, a read clock, and a mode signal.
- FIG. 16 is a circuit diagram for describing communication between a controller and a semiconductor device at the time of writing and reading.
- 17 is a circuit diagram for explaining another embodiment of the present invention.
- FIG. 18 is a circuit diagram illustrating an example in which a polarity of a driving voltage of an input / output line of an controller of the present invention can be selected.
- 19 is a diagram illustrating a configuration for each mode when the polarity of the driving voltage of the input / output line (I / O Line) of the controller of the present invention is changed.
- the present invention discloses a semiconductor device having two terminals.
- the semiconductor device may refer to any chip manufactured by semiconductor technology that can be implemented at low price, such as security chips, medical disposable sensors, environmental sensors, small precision industrial sensors, and the like.
- a first terminal 12 and a sensing surface 14 for a first power supply voltage VF are formed on a front side, and a back side is provided.
- the second terminal 16 for the second power supply voltage VB is formed.
- the first terminal 12 for the first power supply voltage VF may be formed in various patterns, such as a metal pattern or a metal pad, and the second terminal 16 for the second power supply voltage VB may be formed.
- it may be formed of a metal plate.
- the semiconductor device 10 includes a substrate 18 between a front side on which the first terminal 12 and the sensing surface 14 are formed and a back side on which the second terminal 16 is formed, and the substrate 18 is formed of P. It may be formed of a type semiconductor substrate (P-substrate). On the substrate 18, various circuits for processing the sensing surface 14 and data (lead and write) are formed by semiconductor technology.
- the semiconductor device 10 exemplifies that the first terminal 12 and the second terminal 16 are formed on different surfaces of the substrate 18, the semiconductor device 10 may be formed on the same surface of the substrate 18 without being limited thereto.
- the sensing surface 14 may also be formed on one surface of the substrate 18 alone.
- Deep N-wells are formed in the substrate 18, and N-wells and P-wells are formed in the deep N-wells.
- P + junctions and N + junctions for forming sources and drains are formed in the N wells and P wells, and patterns P_gate and N_gates for forming gates are formed.
- all CMOS devices in a semiconductor device are formed in N wells and P wells formed in deep N wells, and FIG. 2 shows one CMOS device for convenience.
- a P well may be formed in a region separated from the deep N well of the substrate 18, and a P + junction connected to an input / output (I / O) circuit may be formed in the P well.
- the P well is for widening the contact surface with the P type substrate. Therefore, even if only the P + junction is formed without the P well, the P + junction has the same characteristic as that of the input / output (I / O) circuit.
- the CMOS device may be formed by the deep N-well structure as described above, and the ground And a terminal to which the voltage VSS is applied and a terminal to which the data input / output voltage VIO is applied.
- FIG. 2 illustrates a metal layer forming first and second terminals 12 to which the first power supply voltage VF is applied and second terminals 16 to which the second power supply voltage VB is applied to both surfaces of the substrate 18. This illustrates that formed.
- a PN diode is formed between the P-type substrate and the deep N well.
- the data input / output voltage applied to the substrate 18 is represented by VIO, and the operating voltage acting on the CMOS device is represented by VDD.
- the signal of the second terminal 16 on the back side is connected to the internal power supply of the CMOS device through the PN junction formed by the substrate 18 and the deep N well. It may be delivered to the corresponding VDD node, and the PN junction is blocked when the data input / output voltage VIO is negative.
- Capacitance exists between an operating voltage VDD node corresponding to an internal power supply and a ground voltage VSS node corresponding to a first terminal, and the rectifying function may be performed by the capacitance.
- the CMOS device is used for input / output (I / O) of data and at the same time, corresponds to a first terminal for applying a contact and ground voltage VSS corresponding to a second terminal for generating an internal power supply voltage VDD. Has a contact.
- a contact for applying a ground voltage (VSS) forms a first terminal, a contact for input / output (I / O) of data, and a rectifier circuit having a PN diode and a capacitor.
- VSS ground voltage
- I / O input / output
- the CMOS device of the present invention has a structure of two terminals for power supply voltages VB and VF, similar to a resistor or a diode which is a normal two terminal device. Therefore, providing a pull-down signal to a VB terminal to which a contact for input / output is connected and a pull-up signal to a VF terminal to which a ground voltage is applied have the same operation from the standpoint of a CMOS device.
- the CMOS device of the present invention can be implemented in two different ways of applying an external signal to cause the same operation.
- the semiconductor device of the present invention which is composed of a CMOS element having the above-described configuration, may have two terminals, one of which may have a configuration in which data is shared for communication and power supply.
- the semiconductor device of the present invention may have a rectifying function for obtaining a power supply voltage from data.
- FIG. 3 may be schematically illustrated in FIG. 3, and the semiconductor device 10 may secure power from data and perform data communication by using the configuration of FIG. 3.
- FIG. 3 illustrates a structure in which the voltage regulator using the PMOS transistor M is added to improve the variability of the operating voltage VDD voltage in the structure of FIG. 2.
- systems that do not require the correct supply voltage can operate by directly using the operating voltage VDD without a voltage regulator.
- the semiconductor device 10 of FIG. 3 includes an input / output circuit 20, a CMOS circuit 22 implemented as an element array of CMOS elements, capacitors Cp and Cps, a comparator 24 for controlling charging of a power source, and charging.
- PMOS transistor (M) and rectifying diode (D) for regulation.
- the diode D is formed by the deep N well when the first terminal 12 and the second terminal 16 are formed on different surfaces of the substrate 18.
- the second power supply voltage VB indicates a voltage applied to the second terminal 16 shared with the data input / output terminal among the first terminal 12 and the second terminal 16.
- the semiconductor device 10 may perform charging and writing of data.
- the diode D and the capacitor Cps constitute a rectifier circuit.
- the PMOS transistor M, the comparator 24, and the capacitor Cp constitute a regulator, and the rectifier circuit and the regulator control charging using data.
- the data is rectified by the diode D and the capacitor Cps and then transferred to the capacitor Cp through the PMOS transistor M, and the capacitor Cp is charged by the potential of the rectified data.
- the regulator controls the transfer of data to the capacitor Cp for charging by the operation of the comparator 24 comparing the charging amount of the capacitor Cp with a preset reference voltage Vint_ref.
- the output of the rectifier circuit made of the diode D and the capacitor Cps without the regulator may be used directly.
- the capacitors Cp and Cps are used for a power source and can perform charging using the output of the diode D.
- data transferred through the second power supply voltage VB is input to the input / output circuit 20. If the semiconductor device 10 is in the read mode, the data provided from the input / output circuit 20 may be output through the second terminal for applying the second power voltage VB.
- the input / output circuit 20 includes buffers for inputting and outputting data, respectively, which will be described later.
- the CMOS circuit 22 performs an operation of reading input data and reading data to be output.
- the CMOS circuit 22 interfaces with the input / output circuit 20 to write and read data.
- the CMOS circuit 22 may secure electrical characteristics of the object to be sensed through the sensing surface 14.
- the CMOS circuit 22 may be represented by an element array including at least one of a sensor element and a memory element formed using the CMOS element.
- the sensor element and the memory element mean the minimum sensor unit and the minimum memory unit using the CMOS element.
- An array of sensor elements may be referred to as a sensor array, and an array of memory elements may include a memory array.
- the element array may be expressed as either a sensor array or a memory array.
- CNTs Carbon Nano-Tubes
- FIG. 4 a case in which 16 electrodes are included in each unit array of the sensing surface 16 and a CMOS device is configured to correspond to each electrode is illustrated.
- the electrodes corresponding to the remaining CMOS devices are automatically connected to the ground voltage to provide a surrounding CNT resistance.
- the semiconductor device of the present invention can sense the electrical characteristics of the object to be sensed by the action of the CNT resistance as shown in FIG. 4.
- the serial communication method is to transmit several data sequentially through one line.
- Asynchronous serial communication without an external clock signal separates data into n binary data bits and transmits them one bit at a time to the communication line.
- the receiving side must assemble the bits received through the communication line and restore the data. At this time, a start bit and a stop bit may be used to identify one data range.
- the transmitting end transmits the data bits after transmitting the start bits.
- the data may include seven or eight data bits within one data range.
- the transmitting side and the receiving side need to match the baud rate, which is the transmission rate of the data bits.
- Conventional UART (Universal Asynchronous Receiver & Transmitter) technology is asynchronous serial communication technology with high and low values set to 0 to 5V.
- the present invention implements a semiconductor device having two terminals, and one terminal of the semiconductor device is shared for data communication and power supply.
- the shared terminal of the semiconductor device of the present invention is used to secure power while being used for input and output of data.
- the data input through the shared terminal of the semiconductor device may be used as the power supply voltage by rectification and charging by capacitance when passing through the PN junction diode or the MOS diode.
- the input data needs to have a larger size of the high section than the low section.
- the present invention generates a pulse having a short row period at the time of transition of data from which the external actual data input goes from low to high or from high to low while keeping the data input / output signal VIO high,
- a pulse transmission method is used, which is carried on a signal VIO, and restores the transmitted pulse signal to an external actual data input signal using a toggle flip-flop in a semiconductor device.
- the power supply voltage can be stably maintained by the rectifying function even when the potential of the data is changed according to the change of the data value by the pulse method.
- the asynchronous serial communication system of the present invention uses a semiconductor device having only two terminals, and outputs from the semiconductor device through an operation of giving a command to one or more semiconductor devices using one controller (write operation) and one communication line.
- Disclosed is a communication method for performing an operation (lead operation) of sequentially receiving data.
- the semiconductor device having two terminals of VF and VB of the present invention has a structure in which the ground voltage VSS is fixed to the VF terminal and the pulse data having a short low period is applied to the VB terminal or the operating voltage VIO is fixed to the VB terminal. In this case, the pulse data having the short high section of the opposite polarity is applied to the VSS terminal, thereby ultimately causing the same operation.
- the system of the present invention adopts an asynchronous serial communication technique for communicating through one communication line and a pulse transmission technique for efficiently rectifying data and converting it into a power source.
- the system of the present invention employs a technique of checking and using a transmission time interval in order to distinguish data that changes in time in the semiconductor device on the receiving side.
- FIG. 1 An embodiment of the asynchronous serial communication system of the present invention employing the above technique is illustrated in FIG.
- the controller 100 may be implemented as a chip and mounted on the control module 11.
- the control module 11 may include a controller 100 and a signal converter 116, and the signal converter 116. Performs signal conversion for interfacing with an external device such as a personal computer (PC).
- PC personal computer
- one terminal may be defined as a terminal connected to an I / O line used as a communication line, and the other terminal. May be defined as a terminal connected to a power line for applying a voltage for defining a voltage of an I / O line.
- the semiconductor device 10 includes an input buffer 30, a pulse signal restore circuit 32, and a command decorator 34 to receive data.
- the semiconductor device 10 includes a first in first out (FIFO) memory 42 and an output buffer 40 for storing data to be output according to a predetermined protocol.
- FIFO first in first out
- the semiconductor device 10 may include a circuit (clock generator 36) for making a clock of a fixed frequency internally to match a baud rate with an external controller 100, and optionally a start bit ( And a circuit for measuring the edge of the start bit to determine the capture timing of the serial data.
- a circuit for making a clock of a fixed frequency internally to match a baud rate with an external controller 100, and optionally a start bit ( And a circuit for measuring the edge of the start bit to determine the capture timing of the serial data.
- the sensor array 52 of FIG. 5 corresponds to the CMOS circuit 22 of FIG. 3 and corresponds to an element array including sensor elements.
- FIG. 5 shows elements for receiving and outputting data and the elements for charging shown in FIG. 3 are not shown.
- the semiconductor device 10 is initialized to have a write mode in a default state.
- the semiconductor device 10 recognizes the pulse signal in the input buffer 30, restores the recognized pulse signal to the actual signal in the pulse signal recovery circuit 32, and restores the restored signal. Is recognized as data using the command decoder 34.
- the semiconductor device 10 recognizes the write mode by the command decoder 34, provides an address to be written by the address providing unit 50 corresponding to the write mode, and data corresponding to the address is provided to the sensor array 52. Is provided.
- the data recognized by the command decoder 34 is written to the sensor array 52 of the address provided by the address providing unit 50.
- the pulse signal recovery circuit 32 recovers the signal by the clock signal provided from the clock generator 36, and the clock generator 36 detects the start bit as described later with reference to FIGS. 9 and 10. It is possible to provide a clock signal of a fixed frequency.
- the semiconductor device 10 starts a read operation corresponding to one of the command codes, that is, the read mode code.
- the semiconductor device 10 When the read mode code and the clock signal are input from the controller 100, the semiconductor device 10 outputs data at a designated address of the sensor array 52.
- the command decoder 34 recognizes the read mode code restored by the pulse signal recovery circuit 32 and provides a read command, and the address providing unit 50 provides an address to read in response to the read mode.
- the clock signal of the clock generator 36 is used to sequentially synchronize a plurality of data of an address provided by the address provider 50, and the semiconductor device 10 automatically outputs all data of a predetermined length. Return to write mode and wait for the next command input.
- the read mode code may include a unique code assigned to each semiconductor device 10. In this case, only the semiconductor device 10 corresponding to the unique code for identifying the semiconductor device 10 may perform a read operation.
- the analog signal output from the sensor array 52 inside the semiconductor device 10 is converted into a digital signal through the analog-to-digital converter 54, and the digital signal is output after passing through the pippo memory 42.
- the buffer 40 is transferred to an I / O line.
- the controller 100 receives data transmitted through an I / O line by a protocol promised in advance.
- the semiconductor device 10 uses the bago memory 42 to output data in a size defined by a promised protocol.
- the cover memory 42 repeats the operation of sequentially storing and outputting data of a predetermined size until the mode data is output.
- the controller 100 generates a signal to be transmitted through one I / O line as a protocol that the semiconductor device 10 having two pins can receive, and the semiconductor device 10 having two terminals is provided. Receives a signal transmitted through one input / output line (I / O line) by a specified protocol.
- the controller 100 is interfaced with the signal converter 116 to receive the transmission signal Tx, the clock signal CLK and to transmit the reception signal Rx.
- the controller 100 receives a voltage regulator 102 for generating a stable voltage for operation of the semiconductor device 10 having two terminals, a command decoder for receiving a transmission signal Tx and providing a command (data). 104, a baud rate generator 106 for generating capture timing of data provided by the two-pin semiconductor device 10 needs to be included.
- the controller 100 outputs a voltage to the pulse signal generator 108 for loading a signal on one I / O line and an input buffer 110 for receiving a signal input from the outside without error. ) And an output buffer 112 are required.
- the signal input from the semiconductor device 10 to the controller 100 is a signal of a relatively low level.
- the controller 100 needs a sensor having an amplifier to receive a low level signal, and before transmitting the signal sensed by the sensor to an external device such as a personal computer (PC), Logic circuitry is needed to add a start bit, stop bit, etc. to match the UART.
- PC personal computer
- the controller 100 includes a converter 114 for transmitting data to an external device such as a personal computer (PC), which converts the sensing signal to match the sensor and transmission protocol with the above-described amplifier.
- PC personal computer
- the logic circuit described above may be included.
- the controller 100 corresponds to a voltage regulator 102 that generates and provides a stable voltage necessary for the operation of the semiconductor device 10 having two terminals, corresponding to an external transmission signal.
- a command decoder 104 for providing data, a baud rate generator 106 for generating capture timing of data provided from a semiconductor device 10 having two terminals, and one input / output line The signal of the pulse signal generator 108 using the voltage of the voltage regulator 102 and the pulse signal generator 108 that provides a signal for loading the data of the command decoder 104 on the I / O line according to the timing of capture.
- An input buffer 110, and an input buffer 1 And a converter 114 for transmitting the signal of 0) to the external device.
- the transmission ratio generator 106 and the converter 114 included in the controller 100 may be configured externally as additional components.
- FIG. 6 illustrates a data stream for describing a sequential data reception method through UART communication.
- FIG. 6 illustrates that start bits and stop bits are added before and after data for asynchronous serial communication.
- the data remains at a high level in the standby state.
- the data is exemplarily 1.5 and 2.5 based on the start timing of the Start bit, which transitions from the high level to the low level.
- the timing may be sequentially recognized at a timing having a delay value such as.
- a delay value may be applied to a timing of recognizing data, and a delay value D of 1 corresponds to one period of the start bit. Therefore, the timing of recognizing the data when the delay value is 1.5 corresponds to one period and a half of the start bit has elapsed from the start timing of the start bit, and the timing of recognizing data when the delay value is 2.5 is the start of the start bit. This corresponds to two and a half cycles of the start bit from timing.
- the transmitting chip when it is configured to recognize data using a delay circuit, there is a problem that the transmitting chip must know the fixed delay value of the receiving chip, and a baud rate corresponding to the delay value must be set in the transmitting chip. have.
- the delay value of the delay circuit may vary according to conditions such as a process condition or a temperature environment for manufacturing a chip. Therefore, there is a problem in recognizing the data transmitted by the asynchronous serial communication method using the delay circuit.
- An embodiment of the present invention includes a circuit for measuring a low section in which the start bit is enabled in the signal transmitted from the controller 100 by the semiconductor device 10 to overcome the above problems.
- a variable transmission delay (Baud Delay) is generated, and a method of sequentially recognizing data using the transmission delay (Baud Delay) is disclosed.
- data may be recognized using a ring oscillator as shown in FIG. 7, and the ring oscillator of FIG. 7 includes a time point at which the start bit becomes low and a section returned to high. It can be measured.
- the ring oscillator may be configured in clock generator 36.
- the ring oscillator includes a plurality of delay circuits (DUCs) 70 and a NOR gate 72, and each delay circuit 70 includes a latch 74 as shown in FIG. 8.
- the plurality of delay circuits 70 form a chain connected in series
- the NOR gate 72 has a plurality of delays connected in series with an enable signal EN that transitions from high to low at the start of the start bit. And receive the delay signal returned from the circuit 70 and provide an output to the first delay circuit 70.
- the enable signal EN remains low after transitioning from high to low.
- the delay signal refers to a signal transferred between the delay circuits 70.
- the delay signal returned to the NOR gate 72 is initially maintained low and is converted high when the start bit transitions high. .
- the ring oscillator includes several delay circuits 70 connected in series and measures the low period of the start bit by maintaining or stopping the delay of the delay signal transmitted between the delay circuits 70 by the output of the latch 74. .
- the ring oscillator is configured such that a delay signal is returned to the NOR gate 72 from the delay circuit 70 corresponding to the time when the transfer of the delay signal between the delay circuits 70 is stopped by the end of the start bit.
- each delay circuit 70 is demonstrated.
- the delay circuit 70 includes a forward line for advancing the delay signal in the forward direction and a backward line for advancing the delay signal in the backward direction.
- the delay circuit 70 delays the forward switch ST configured to selectively connect the forward line and the backward line, and the forward switch SF configured on the forward line and the forward direction to advance the delay signal in the forward direction. And a forward switch SB configured on the backward line to advance the signal.
- the delay circuit 70 includes a delay line configured to delay a delay signal on the forward line.
- the delay circuit 70 includes a forward switch SF and a delay circuit 70 of a next stage.
- the apparatus may further include a precharge switch SC for precharging the forward line therebetween, and the precharge switch SC may be operated to precharge the forward line when the forward switch SF is turned off.
- the pass switch ST and the progress switches SF and SB may be configured as transfer gates in which an NMOS transistor and a PMOS transistor are coupled in parallel.
- the reverse output QB of the latch 74 is applied to the gate of the NMOS transistor, and the positive output Q of the latch 74 is applied to the gate of the PMOS transistor.
- the forward switches SF and SB the positive output Q of the latch 74 is applied to the gate of the NMOS transistor, and the reverse output QB of the latch 74 is applied to the gate of the PMOS transistor.
- the precharge switch SC may be configured as an NMOS transistor, and the reverse output QB of the latch 74 is applied to the gate.
- the delay circuit 70 includes a latch 74 that provides a switching signal for determining a switching state of each of the switches SF, SB, and SC.
- the latch 74 may be configured as an SR flip flop.
- the delay circuit 70 includes an AND gate 75 to which a delay signal transmitted through the forward line and a signal in which the start bit is inverted (/ START, hereinafter referred to as reverse start bit) are input.
- the output is configured to be provided to the latch 74 as a set signal SET.
- the latch 74 determines the states of the positive output Q and the reverse output QB by the states of the set signal SET and the reset signal RESET.
- the positive output Q and the reverse output QB of the latch 74 correspond to a switching signal.
- the latch 74 outputs the positive output Q to the low level and the reverse output QB to the high level when the reset signal RESET is enabled at the high level or the set signal SET is disabled at the low level. do.
- the latch 74 outputs the positive output Q to the high level when the set signal SET is enabled to the high level while the reset signal RESET is disabled to the low level, and the reverse output QB. Outputs to the low level.
- the delay circuit 70 is reset, the pass switch ST is opened by the reset of the delay circuit 70, and the progress switches SF and SB are closed.
- the enable signal EN also transitions from high to low.
- the reset signal RESET is set to disable.
- the NOR gate 72 When the enable signal EN transitions to the low level, the NOR gate 72 outputs a high level delay signal to the first delay circuit 70 because the inputs are all set to the low level.
- the latches 74 of the respective delay circuits 70 are sequentially set by the sequentially transmitted delay signals, and the constant output ( Output Q) at high level.
- the pass switch ST is closed and the progress switches SF and SB are opened.
- the delay signal proceeds in the forward direction during the enable period in which the reverse start bit is kept high, and the delay signal is delayed until the start bit transitions from low to high. Delivered through field 70.
- the pass switch ST of the delay circuit 70 corresponding to the time point at which the start bit ends is opened and the progress switches SF and SB are closed. Therefore, the delay signal no longer proceeds in the forward direction and is transmitted from the forward line to the backward line through the pass switch ST and returned through the backward line.
- the delay signal travels in the forward direction through the forward lines of the multiple delay circuits 70 overlapped from the start point of the start bit to the end point, and the back of the multiple delay circuits 70 overlapped at the end point.
- the delay signal is returned to the NOR gate 72 through the word line.
- the path through which the delay signal is returned can ideally be assumed that no delay time is applied.
- Delay time at the time of transitioning from low to high (rising time) of the delay line in the delay circuit 70 and rising time to transition from high to low (polishing time point) Assuming that the delay times are equal to, the ring oscillator may generate an oscillation signal having a period corresponding to twice the pulse width of the start bit.
- a delay line may be configured to have a delay time at a polling time more than a delay time at a rising time.
- the delay line of the delay circuit is higher to low than the low to high delay for the delay signal so that the delay signal compensates for the delay of the pass switch ST and the delay through the backward line.
- the delay can be configured to be shorter.
- the clock duty adjustment is necessary so that the delay obtained by adding up the delays of the forward line and the backward line becomes a delay that actually determines the period of one oscillation signal.
- the delay line may be designed to include two or more stages of a driving circuit of a CMOS transistor structure in which a PMOS transistor and an NMOS transistor are combined, and a capacitor may be additionally configured at an output terminal of the driving circuit of each stage if necessary.
- the period of the oscillation signal is determined by the number of steps of the driving circuit and the resistance values present in each step. Therefore, the period of the oscillation signal can be adjusted by varying the resistance value to adjust. Alternatively, the period of the oscillation signal may be determined by adjusting the gate bias voltage applied to each step when used as a resistor using an NMOS transistor or a PMOS transistor. Therefore, the adjustment of the clock duty can also be made by adjusting the resistance value.
- FIGS. 9 and 10 are waveform diagrams illustrating a method of measuring a pulse width of a start bit and generating a capture signal for data recognition by itself without an external clock signal.
- the pulse width measurement of the start bit can be performed in the clock generator 36, and the generation of the capture signal and the detection signal described later can be performed in the pulse signal recovery circuit 32.
- the period of the oscillation signal generated by the start bit of FIG. 9 is twice the transmission size of the start bit as described with reference to FIGS. 7 and 8.
- a detection circuit is needed that detects transition time points that transition from high to low or low to high of the oscillation signal, and generates detection pulses that are synchronized with the detected time points.
- a delay circuit for delaying the detection pulse is required so that the detection pulse is located in the middle of the period in which data is transmitted.
- the above detection circuit and delay circuit may be configured in the pulse signal recovery circuit 32.
- the controller 100 When the controller 100 is configured to generate a capture signal through a signal processing process as illustrated in FIG. 9, the controller 100 may use a signal protocol transmitted from the outside as it is, so that modification of the signal is unnecessary.
- the controller 100 may be configured to reduce the interval of the start bit sent to the semiconductor device 10 by half.
- the controller 100 needs a circuit for reducing the interval of the start bit of the externally received signal in half.
- the period of the oscillation signal generated by the oscillator becomes equal to the baud size of the start bit.
- the timing for data recognition can be secured without the need for a delay circuit, and there is no difference in timing due to the clock duty.
- the controller 100 When generating the oscillation signal as shown in FIG. 10, the controller 100 needs to apply a delay circuit for delaying the detection signal so that the controller 100 may have a timing for detecting a transition or recognizing data as compared with the case of FIG. 9. none.
- the controller 100 requires a separate signal processing process for adjusting the start bit, and when the delay step is small in the process of measuring the start bit of a short interval, the ring The oscillator may generate a rounding off error.
- the present invention may select a controller 100 for performing the signal processing process of FIG. 9 or FIG. 10 to determine timing for capturing data at the convenience of the manufacturer.
- embodiments of the present invention disclose a method for enabling the operation of the semiconductor device 10 with two terminals by efficiently sharing data and power.
- the semiconductor device 10 having two terminals may be configured to share a power supply with a data line using a rectifying circuit having a diode and a capacitor as shown in FIG. 11.
- FIG. 11 illustrates that the controller 100 and the semiconductor device 10 transmit data by a tri-state input / output method.
- FIG. 11A is a circuit diagram illustrating writing data from the controller 100 to the semiconductor device 10
- FIG. 11B shows data from the semiconductor device 10 to the controller 100. It is a circuit diagram representing what leads.
- the output buffer 112 of the controller 100 When data is written from the controller 100 to the semiconductor device 10 as shown in FIG. 11A, the output buffer 112 of the controller 100 is always in an on state, and the output buffer of the semiconductor device 10 ( 40) is always off.
- the signal output from the controller 100 is transmitted to the input buffer 30 of the semiconductor device 10, and at the same time, a high level signal is provided as a power source for providing the operating voltage VDD through the diode D.
- the operating voltage VDD may be provided by charging the capacitor Cp in the high level section of the signal output from the controller 100.
- the amount of charge charged in the capacitor Cp of the semiconductor device 10 is operated when the data is kept low or the row period is lengthened by a low frequency operation. May be insufficient to maintain voltage VDD.
- the signal output from the semiconductor device 10 is based on the amount of charge charged in the capacitor Cp, and thus an operation period when controlling the three-state input / output If the load is large or the load of the I / O line is large, the capability of driving data from the semiconductor device 10 to the controller 100 may be reduced. That is, difficulty in transferring data from the semiconductor device 10 to the controller 100 may occur.
- the controller 100 transmits a reference signal to the semiconductor device 10 for synchronization and receives the data of the semiconductor device 10.
- the controller 100 transmits a reference signal to the semiconductor device 10 for synchronization and receives the data of the semiconductor device 10.
- the output buffer 112 of the 100 is turned off, when the time required for the semiconductor device 10 to receive a reference signal and send data becomes long, a period in which the semiconductor device 10 is not supplied with power increases and operates. It can be difficult to maintain the voltage VDD.
- the present invention can communicate by generating a pulse signal having a narrow width and a small level displacement at the time when the potential of the I / O line is always kept high and the data transition occurs.
- the controller 100 and the semiconductor device 10 may have a protocol for stably maintaining the operating voltage VDD and restoring a pulse signal having a narrow width and a small level displacement to data according to the above-described embodiment. Can be configured.
- the present invention may be configured to reduce the time delay due to synchronization by simultaneously measuring the voltage level of the pulse signal in the controller 100 and the semiconductor device 10 even in the case of a read requiring synchronization.
- FIG. 12 illustrates a circuit diagram and waveforms related thereto for explaining writing data from the controller 100 to the semiconductor device 10 having two pins.
- I / O Line an input / output line
- the controller 100 maintains the pull-up so that the input / output line I / O Line maintains the input / output reference voltage IOref or higher, and when the transmission signal Tx is input, the input / output line I at the transition point of the transmission signal Tx. / O Line), and the pulldown is stopped when the voltage (pulldown signal) of the I / O line reaches the preset reference voltage (Vref), and after the pulldown stops, the I / O line
- the voltage level of the line is returned by the pull-up and is configured to output a pulse signal swinging by the pull-up and pull-down to the input / output line (I / O line) in response to the transmission signal Tx.
- the controller 100 includes a pulse generator 120, an input / output voltage regulator 126, and a pull-down controller, and when the transmission signal Tx is input, the pulse generator 120 at the time of transition of the transmission signal
- the input / output voltage regulator 126 is configured to generate a corresponding pulse
- the input / output line I / O line is configured to perform a pull-up for maintaining the input / output reference voltage IOref or more
- the pull-down control unit includes a pulse generator ( The I / O line is pulled down in response to the high level signal of 120. When the voltage (pull down signal) of the I / O line reaches the preset reference voltage Vref, the pull down is performed. Configured to stop.
- the voltage level of the I / O line is returned by the pull-up, and a pulse signal swinging by the pull-up and pull-down is output to the I / O line in response to the transmission signal Tx. .
- the pull-down control unit turns on and performs a pull-down by turning on the transistor Mn when a high-level signal is input from the transistor Mn and the pulse generator 130 to pull down the I / O line.
- the comparator 124 may control the AND gate 122 to stop the pull-down when the voltage of the input / output line I / O line reaches the preset reference voltage Vref by the reference numeral 122 and the pull-down.
- the semiconductor device 100 performs charging and writing modes using a pulse signal.
- the semiconductor device 100 corresponds to an output of the input buffer 30 and the input buffer 30 which compares the pulse signal with a preset comparison voltage and provides a signal corresponding to the difference between the pulse signal and the comparison voltage for the write mode.
- the semiconductor device 100 includes a diode (D) and a diode for receiving a signal including a pulse signal through an input / output line (I / O Line) having first and second pins and connected to one pin for charging. It may include a capacitor (Cp) to charge the signal transmitted by (D) to generate an operating voltage (VDDC).
- D diode
- I / O Line input / output line
- Cp capacitor
- the controller 100 When the transmission signal Tx, which is a UART signal, is input from the external device by the above-described configuration, the controller 100 generates a pulse by detecting a transition time (High to Low or Low to High) of the transmission signal Tx.
- the pulse generation corresponding to the transmission signal Tx may be performed by the pulse generator 120, and the pulse generator 120 pulses the result of the combination of the original transmission signal Tx and the predetermined time-delayed transmission signal Tx by an exclusive oral combination. Can be generated.
- the pulse generated by the pulse generator 120 is provided to the AND gate 122.
- the AND gate 122 turns on the NMOS transistor Mn, and the transistor is turned on.
- the input / output line (I / O Line) is pulled down by turning on (MnQc).
- the pull-down signal When the voltage (I / O) level of the I / O line, i.e., the pull-down signal reaches the reference voltage Vref applied to the comparator 124, pull down of the I / O line is stopped.
- the voltage I / O of the input / output line I / O line returns to the original high level from the moment when the pull-down is stopped.
- the input / output voltage regulator 126 performs a regulation operation so that the voltage I / O of the input / output line I / O Line maintains a higher level than the preset input / output reference voltage IOref.
- the controller 100 repeatedly performs the above operation for each transition time of the transmission signal Tx.
- the controller 100 may output a triangular wave-shaped pulse signal swinging between the reference voltages IOref and Vref level corresponding to the transmission signal Tx.
- the level of the reference voltage Vref may be determined between the input / output reference voltage IOref and the ground voltage level, and a predesigned value may be selected according to the manufacturer's intention.
- the semiconductor device 10 having two pins receives a signal including a triangular wave-shaped pulse signal through an input / output line (I / O line), and operates by rectifying the diode D and the capacitor Cp. Generate the voltage VDD.
- the signal of the I / O line is always maintained at a high level except for a short section in which a triangular wave exists. Therefore, the semiconductor device 10 can stably maintain the operating voltage VDD, and can generate a high quality operating voltage VDD in which glitch noise is filtered according to the capacitance of the capacitor.
- a signal transmitted to the semiconductor device 10 through an I / O line is provided to the input buffer 30 in the form of a comparator.
- the input buffer 30 compares the comparison voltage (the operating voltage VDD or the reference voltage of a level capable of recognizing a triangle-shaped pulse) with the signal of the I / O line, and compares the signal of the I / O line. A signal corresponding to the difference between the signal and the comparison voltage is provided to the pulse generating circuit 130.
- the comparison voltage the operating voltage VDD or the reference voltage of a level capable of recognizing a triangle-shaped pulse
- the pulse generating circuit 130 provides the AND gate 132 with a pulse having a transition time synchronized with the output of the input buffer 30.
- the AND gate 132 transfers the pulse of the pulse generating circuit 130 to the toggle flip-flop 134 in the write mode, and the toggle flip-flop 134 has the same phase as the transmission signal Tx transmitted to the controller 110. Data can be restored.
- the present invention can be implemented as shown in FIG. Referring to FIG. 13, the exemplary embodiment of the present invention automatically resets the toggle flip-flop 134 when the initial power is turned on and when there is no pulse input for a preset maximum number of bits. By doing so, communication errors caused by the glitch signal can be prevented.
- the preset maximum number of bits may be exemplified as nine, the maximum number of bits of the reference communication of the UART communication.
- the clock counter 36 and the end gate 138 may be represented by an error protection circuit.
- the clock counter 136 performs a counting operation using a clock signal generated therein, counts a preset maximum number of bits, and resets the pulse input (Data_Pulse) output from the AND gate 132 during the counting. When the count for the set maximum number of bits is completed, a high level signal corresponding to the result is provided to the AND gate 138.
- the AND gate 138 resets the toggle flip-flop 134 when the clock counter 136 counts the maximum number of bits already set in the power-up state.
- FIG. 14 is a diagram illustrating a circuit and waveforms related thereto for explaining an operation of reading data from the semiconductor device 10 having two pins in the controller 100.
- FIG. 14 shows an embodiment further comprising a circuit for reads, in contrast to the embodiment of FIGS. 12 and 13.
- the pulse generating circuits 130 and 140 illustrated in the controller 100 and the semiconductor device 10 may be implemented as a constant pulse generator, and may generate pulses having a constant width and glitch.
- the noise may prevent one input from being recognized as two or more inputs.
- the controller 100 and the semiconductor device 10 When a read command is included in the transmission signal Tx transmitted from the outside, the controller 100 and the semiconductor device 10 perform a read, and a predetermined number of read clocks Rclk are activated in the controller 100.
- the input / output line I / O line may be pulled down when the read clock Rclk changes to a high level in the controller 100.
- the pull-down of the I / O line may be controlled according to the output state of the comparator 124.
- the comparator Since the output state of 124 is different, the pulldown to the I / O line is stopped.
- the pulse generating circuit 140 receiving the output of the comparator 124 generates a pulse having a constant width.
- the constant width pulse output from the pulse generator circuit 140 turns off the PMOS transistor M2.
- the turn-off of the PMOS transistor M2 means that the voltage regulator 126 and the I / O line are separated.
- the input / output line I / O line is in a floating state in which only the termination resistor R exists.
- the semiconductor device 10 outputs data to the I / O line while the I / O line is floated as described above, the voltage of the I / O line is changed. .
- the voltage change of the input / output line (I / O line) may be sensed by the double sampling differential amplifier 150 of the controller 100, and a pulse provided from the pulse generating circuit 140 may be sensed. Upon termination, the double sampling differential amplifier 150 latches the sensed signal.
- the double sampling differential amplifier 150 generates positive and negative voltages at the start and end of the pulse provided from the pulse generator circuit 140 by the sequential switching operations of the switches SW1 and SW2. Sampling to the capacitors of the stages (-) respectively.
- the double sampling differential amplifier 150 outputs the difference between the voltages sampled twice as the read data Dout.
- the termination resistor R is preferably calibrated to a value suitable for sensing data output from the semiconductor device 10, and the termination resistor R is calibrated through the input / output line I / O line. Noise inflow can be reduced. That is, the resistance value of the termination resistor R is adjusted to reduce the sampling difference value of the controller 100 when it is biased to the high side, and to increase it when it is biased to the low side, so that the sampling value of high and low is balanced.
- the semiconductor device 10 changes the output of the input buffer 30.
- the pulse generating circuit 130 outputs a pulse having a constant width.
- the input buffer 30 may be configured to determine the output using the same reference voltage Vref as applied to the comparator 124 of the controller 100. On the basis of the point in time at which the output level of the input buffer 30 changes from high to low, the pulse generating circuit 130 outputs a pulse maintaining the high level for a predetermined time.
- the input / output switch (I / O switch) is turned on while the pulse of the pulse generating circuit 130 is maintained at a high level while the read mode is activated by the output of the AND gate 133. That is, data output through the output buffer 40 in this section may be transferred to the controller 100.
- the flip-flop 43 configured at the last stage of the target memory 42 is shifted in synchronism with the timing at which the pulse of the pulse generating circuit 130 transitions to the low level, and the flip-flop 43 is shifted by shifting the flip-flop 43.
- Data output from the final stage of 42 is transmitted to the controller 100 via the output buffer 40 and the I / O switch.
- the pulse generating circuits 130 and 140 of the controller 100 and the semiconductor device 10 may include a delay unit 142, an end gate 144, an SR flip-flop 146, and a content delay unit ( constant delay 148).
- the delay unit 142 delays the input signal to a preset value.
- the AND gate 144 generates a pulse by combining the signal inverting the input of the pulse generator circuits 130 and 140 and the output of the delay unit 142.
- the SR flip-flop 146 receives the pulse of the AND gate 144 as a set signal, receives the signal of the constant delay unit 148 as a reset signal, is triggered by the set signal, and is delayed by the constant delay unit 148. Output the timed pulse.
- the constant delay unit 148 provides a signal for resetting the SR flip-flop 146 in response to a change in the output of the SR flip-flop 146 and controls the SR flip-flop 146 to output a pulse of a constant width. do.
- the delay unit 142 may preferably set a delay to a minimum value so that the AND gate 144 outputs a pulse having a minimum pulse width recognizable by the SR flip-flop 146.
- the semiconductor device 10 generates a pulse having a predetermined width in the pulse generating circuit 130, such as the controller 100, at the moment when the input / output line I / O line becomes the reference voltage Vref.
- the input / output switch (I / O switch) is turned on during the high period of the pulse output from the pulse generator circuit 130, and outputs the output data stored in the pipo memory 42 to the input / output line (I / O line).
- the semiconductor device 10 and the controller 100 generate a pulse having a constant width by using the same reference voltage Vref. Therefore, neglecting the delay on the I / O line has the effect of generating a pulse having a constant width at about the same time.
- the embodiment of the present invention has an advantageous advantage in terms of power consumption because the swing width is small and the pulse is transmitted in a short time through the input / output line (I / O).
- the pulse generating circuits 130 and 140 may prevent the pulse signal from being generated more than once for one level transition by a glitch phenomenon by using the minimum delay in the delay unit 142. . It is preferable that the pulses output from the pulse generating circuits 130 and 140 of the controller 100 and the semiconductor device 10 have the same width. If the input / output line (I / O line) has to consider the delay, it may be considered to increase the pulse width of the pulse generating circuit 140 of the controller 100.
- An embodiment of the present invention may use a transmission signal TX, a read clock Rclk, and a mode signal W / R having a protocol as shown in FIG. 15 to perform read and mode.
- the transmission signal Tx may include data to be written to the semiconductor device 10, a read command code to control the read mode, and a code to distinguish the semiconductor device 10.
- the mode signal W / R may have a waveform that maintains a high level by default in the write mode, changes to a low level in the read mode, and returns to the write mode after the read mode ends.
- the read clock Rclk is alternately formed with intervals for performing periodic sensing and data conversion in response to the read mode. In this manner, when the data is output from the semiconductor device, the present invention generates data. You can reduce the size of the required output buffer by printing directly. In addition, input and output noise may be prevented from entering the noise-sensitive sensing and data conversion section.
- FIG. 16 illustrates an integrated circuit diagram for performing write and read operations in accordance with the present invention.
- FIG. 16 is a combination of FIGS. 12 and 14, except that an OR gate 121 for transmitting the transmission signal Tx of FIG. 12 and the read clock Rclk of FIG. 14 is further added.
- the output of the AND gate 122 changes in response to the pulse corresponding to the read clock Rclk or the transmission signal Tx transmitted through the OR gate 121.
- the semiconductor device 10 having two terminals may provide a different operation method due to voltage characteristics. This is related to the structural form of a two-terminal CMOS device and how voltages are determined. In other words, the voltage applied to the two-terminal CMOS element is determined by the potential difference between the two terminals. Therefore, when the VF terminal is fixed to the ground voltage VSS and the pull-down pulse is applied to the VB terminal or the input / output is reversed to fix the VB terminal to an external power supply and apply a pull-up signal to the VF terminal, the semiconductor device 10 From the standpoint of)).
- FIG. 17 illustrates that the level of the input / output line (I / O line) of the controller 100 is reversed. That is, assuming that the external power supply of the controller 10 is 5V, the operation section is defined as “5V-I / O reference voltage”, and the level of the input / output line (I / O Line) is “5V-I / O reference voltage ( IOref) "
- the NAND gate 122a corresponds to a pulse corresponding to the read clock Rclk or the transmission signal Tx transmitted through the OR gate 121a. The output of is changed.
- the controller 100 senses a level transition (High to Low, Low to High) of the transmission signal Tx or the read clock Rclk using the NAND gate 122a.
- the NAND gate 122a generates a pulse for pulling up the I / O line in response to the transition time of the transmission signal Tx or the read clock Rclk, and the PMOS transistor Mp is connected to the NAND gate 122a. In response to the output, an operation for pulling up the I / O line is performed.
- Tx signal or a read clock Rclk which is a UART signal, from an external device, through the input / output line I / O line, from " 5V-IOref "
- a pulse in the form of a triangular wave having an amplitude of Vref " can be output.
- an input / output line (I / O Line) is connected to a terminal to which a VF voltage (represented by VSS in FIG. 17) is applied among two terminals of the semiconductor device 10, and a fixed voltage of 5 V is applied to the input / output line. It is connected to the other terminal of the semiconductor device 10 which is connected to the (I / O line).
- controller 100 of FIG. 17 is different from the circuit of FIG. 16, since the write and read operations may be understood by the description of the previous embodiments, a redundant description thereof will be omitted. In addition, since the signal of the input / output line I / O line is inverted in comparison with FIG. 16, the controller 100 of FIG. 17 needs to invert and process the data transmitted from the semiconductor device 10.
- the semiconductor device 10 has the same configuration and operation as the previous embodiments except that the level of the I / O line is reversed. Description is omitted.
- the embodiment of FIG. 18 implements the controller 100 of the embodiment of FIG. 16 and the embodiment of FIG. 17 as one.
- the embodiment of FIG. 18 requires configuration of mode selection switches Mode-1 and Mode-2 capable of selecting the mode of FIG. 16 and the mode of FIG. 17.
- the mode of FIG. 16 may be defined as a normal mode
- the mode of FIG. 17 may be defined as a reverse mode.
- FIG. 18 exemplarily shows only the read clock Rclk, and briefly illustrates only circuits related to pull-up and pull-down of I / O lines.
- the embodiment of FIG. 18 includes mode selection switches Mode-1 and Mode-2 for mode switching.
- description of the reference numerals, components, and operations of the components disclosed in FIGS. 16 and 17 will be omitted.
- the controller 100 When the controller 100 is configured as shown in FIG. 18 as described above, the controller 100 has one terminal connected to the first power voltage VF and data of the front side as shown in FIG.
- the semiconductor device 10 operates in response to the shared semiconductor device 10 or corresponds to the semiconductor device 10 in which data is shared with the second power supply voltage VB of the back side as shown in FIG. 19B. Can be operated. Therefore, the controller 100 of FIG. 18 may measure various semiconductor devices 10 while changing modes.
- FIG. 19 illustrates a case in which the semiconductor device 10 has a plurality of electrodes (sensor electrodes) on a surface thereof, forms one terminal in a ring shape around the surface thereof, and has other terminals on the back surface thereof.
- a narrow pulse having an amplitude in which a voltage level decreases in response to data of a light or a read is generated in an input / output line.
- a narrow pulse having an amplitude at which a voltage level increases in response to data of a light or a read is generated in the input / output line (I / O line).
- the controller 100 senses the change of the I / O line described above by the double sampling differential amplifiers 150 and 150a as data and reads the start bit and the stop bit. Bit is added to generate the received signal (Rx).
- the present invention can implement a semiconductor device having two terminals using a CMOS element having two terminals, and the semiconductor device can share one terminal for data communication and power supply. Therefore, the semiconductor device can perform asynchronous serial communication. That is, the semiconductor device may write and read data using one shared terminal.
- the semiconductor device may have a rectifying function for obtaining a power supply voltage from data.
- a semiconductor device having two terminals may generate a reference clock for asynchronous serial communication, thereby implementing writing of data using the reference clock.
- the present invention can stably transfer data information generated inside the semiconductor device to an external controller by minimizing energy loss and size of the internal circuit.
- the present invention can transmit data using the pulse of the short interval
- the controller can restore the data transmitted using the pulse of the short interval, it is possible to increase the efficiency of the rectification function using the data
- Asynchronous serial communication technology can be implemented to improve the error of data transfer process.
- the present invention may determine the read mode and the write mode according to code information included in the data.
- the present invention may generate timing for determining a high or low state of data input in an asynchronous serial mode in a write mode using a data transmission time interval.
- a semiconductor device having two terminals when the data includes a code indicating a read mode, a semiconductor device having two terminals generates a clock signal corresponding to a transmission time interval and forms internal data using the clock signal.
- Data may be received from the unit (a device array including at least one of a sensor device and a memory device formed using a CMOS device), and may return to the write mode after receiving the data.
- the present invention generates an output of the internal data forming unit in synchronization with a reference pulse signal sent from an external controller in a read mode, and loads the output on an input / output terminal having one line and senses the result by an external controller. Can be determined.
- the present invention alternately transfers data from the CMOS circuit to the output buffer and transfers data from the output buffer to the outside when the data is output from the internal data forming unit. Can be reduced.
- one terminal selected from two terminals of the semiconductor device may be shared for data communication and a power supply according to a mode, thereby enabling various applications of the semiconductor device.
Abstract
Description
Claims (25)
- 기판 상의 제1 단자 및 제2 단자;다이오드와 제1 캐패시터를 포함하는 정류 회로; 및CMOS 소자;를 포함하며,상기 제1 단자와 상기 제2 단자 중 어느 하나가 상기 CMOS 소자의 데이터의 입출력을 위한 컨택과 연결되는 동시에 상기 정류 회로에 연결되며,상기 제1 캐패시터에 충전되는 전원을 이용하여 동작되고,상기 데이터의 입출력은 전원공급의 효율을 높이기 위하여 데이터 천이시점에 동기된 펄스 신호를 사용하는 것을 특징으로 하는 반도체장치.
- 제 1항에 있어서,상기 CMOS 소자를 이용하여 형성된 센서 소자와 메모리 소자 중 적어도 하나를 포함하는 소자 어레이가 상기 기판 상의 센싱면을 형성하도록 구성되고,상기 소자 어레이에 대한 상기 데이터의 처리를 위한 회로가 형성된 반도체 장치.
- 제1 항에 있어서,상기 정류 회로의 출력에 대응하는 레귤레이터를 더 포함하며,상기 레귤레이터는,상기 다이오드;제2 캐패시터;미리 설정된 기준전압과 상기 제2 캐패시터의 충전량을 비교하는 비교기; 및상기 비교기의 동작에 의하여 상기 제1 캐패시터에서 상기 제2 캐패시터로 상기 데이터를 전달하는 것을 제어하는 트랜지스터;를 포함하는 반도체 장치.
- 제1 항에 있어서,상기 제1 단자 및 상기 제2 단자 중 데이터의 통신과 전원용으로 공유된 어느 하나의 단자를 통하여 상기 데이터에 대한 입출력을 수행하는 입출력 회로; 및상기 CMOS 소자를 포함하며, 상기 데이터의 라이트와 출력할 데이터의 리드를 위하여 상기 입출력 회로와 인터페이스되는 CMOS 회로;를 더 포함하는 반도체 장치.
- 제1 항에 있어서,상기 제1 단자 및 상기 제2 단자 중,어느 하나가 데이터의 통신과 전원용으로 공유되며 입출력 선에 연결되고,다른 하나에 상기 입출력 선의 전압을 정의하기 위한 전압이 인가되는 반도체 장치.
- 하나의 입출력 선을 통하여 외부에서 제공되는 실제 신호의 천이시점에 동기된 펄스 신호를 인지하는 입력 버퍼;인지된 상기 펄스 신호를 상기 실제 신호로 복원하는 펄스 신호 복원 회로;복원된 신호를 데이터로 인식하는 명령 디코더;상기 명령 디코더의 제어에 따라 소자 어레이의 어드레스를 제공하는 어드레스 제공부; 및상기 명령 디코더의 제어에 따라 상기 소자 어레이의 상기 어드레스에 대하여 상기 데이터의 입력과 상기 입출력 선을 통한 상기 데이터의 출력을 수행하는 입출력 버퍼;를 포함하는 반도체 장치.
- 제6 항에 있어서,상기 소자 어레이에서 제공되는 상기 데이터가 아날로그 신호일 경우 상기 아날로그 신호를 디지털 신호로 변환하는 아날로그 디지털 변환기;를 더 포함하는 반도체 장치.
- 제6 항에 있어서,상기 명령 디코더는 상기 복원된 신호를 이용하여 반도체 장치 별로 할당된 고유 코드를 인식하고 리드 명령을 제공하는 반도체 장치.
- 제6 항에 있어서,상기 어드레스 제공부는 리드 모드에 대응하여 여러 개의 센서나 메모리를 순차적으로 선택하기 위해서 클럭 제너레이터의 클럭 신호를 이용하는 반도체 장치.
- 2개의 단자를 갖는 반도체 장치의 동작에 필요한 안정된 전압을 생성하여 제공하는 전압 레귤레이터;외부의 전송신호를 디코딩하여 데이터와 컨트롤 신호를 생성하는 명령디코더:상기 명령 디코더의 상기 데이터를 펄스 신호로 변환하는 펄스 신호 발생기;상기 전압 레귤레이터의 전압을 이용하여 상기 펄스 신호 발생기의 상기 펄스 신호를 상기 한 개의 입출력 선을 통하여 상기 반도체 장치로 출력하는 출력 버퍼;상기 한 개의 입출력 선을 통하여 상기 반도체 장치로부터 입력되는 신호를 수신하는 입력 버퍼; 및상기 입력 버퍼의 신호를 외부기기가 인식할 수 있는 통신규격으로 변경하는 컨버터;를 포함하는 컨트롤러.
- 링 오실레이터를 이용하여, 비동기 시리얼 통신 방법으로 전송되는 1 비트와 상기 1 비트에 후속하는 복수의 데이터 비트 중 상기 제1 비트의 펄스 폭을 인식한 오실레이션 신호를 생성하는 단계;상기 오실레이션 신호의 천이 시점을 기준으로 캡춰 신호를 생성하는 단계; 및상기 캡춰 신호의 라이징 에지 또는 폴링 에지 중 어느 하나를 이용하여 상기 데이터 비트를 캡춰하는 단계;를 포함하는 비동기 시리얼 통신 방법.
- 제11 항에 있어서,상기 비동기 시리얼 통신 방법에 의한 상기 제1 비트는 스타트 비트이며, 상기 오실레이션 신호는 상기 스타트 비트의 구간을 인식하여 생성되며,상기 캡쳐 타이밍은 상기 캡춰 신호의 라이징 에지 또는 폴링 에지 중 어느 하나를 딜레이시켜 결정하는 비동기 시리얼 통신 방법.
- 제11 항에 있어서,상기 오실레이션 신호는 상기 스타트 비트의 반에 해당하는 구간을 갖는 상기 제1 비트를 이용하며,상기 캡춰 신호를 생성하는 단계는 상기 오실레이션 신호를 상기 캡춰 신호로 이용하는 비동기 시리얼 통신 방법.
- 제11 항에 있어서, 상기 오실레이션 신호를 생성하는 단계는,직렬로 연결된 복수 개의 지연 회로를 통하여 상기 제1 비트의 시작 시점에 인에이블되는 입력신호를 상기 제1 비트의 시작 시점부터 종료 시점까지 포워드 방향으로 순차적으로 지연시키는 단계;상기 제1 비트의 종료 후 상기 입력신호가 지연된 지연 신호를 복수 개의 상기 지연 회로를 통하여 백워드 방향으로 리턴시키는 단계; 및상기 제1 비트의 시작 시점부터 종료 시점까지 형성된 포워드와 백워드 회로가 한번의 반전회로를 거쳐 루프를 형성하여 링 오실레이션을 일으키는 단계;를 포함하는 비동기 시리얼 통신 방법.
- 입출력 선에 대한 풀업과 풀다운을 제어하며, 상기 입출력 전압과 상기 풀업과 풀다운을 제어하기 위한 기준 전압 간을 스윙하며 외부로부터 전송된 전송 신호의 천이 시점에 대응하는 펄스 신호를 상기 입출력 선으로 출력하는 컨트롤러; 및상기 펄스 신호를 이용하여 내부 전원의 충전과 데이터 입력을 수행하는 반도체 장치;를 포함하는 비동기 시리얼 통신 시스템.
- 제15 항에 있어서, 상기 컨트롤러는,상기 전송 신호가 입력되면 상기 전송 신호의 천이 시점에 대응한 펄스를 생성하는 펄스 생성부;상기 입출력 선이 상기 입출력 전압을 유지하도록 하는 입출력 전압 레귤레이터; 및상기 입출력 선이 상기 입출력 전압을 유지하고, 상기 전송 신호가 입력되면 상기 전송 신호의 천이 시점에 상기 입출력 선에 대한 풀업과 풀다운 중 어느 하나를 수행하며, 상기 입출력 선의 전압이 미리 설정된 기준 전압에 도달하면 현재 수행되는 상기 풀업이나 상기 풀다운을 중지하는 제어부;를 포함하며,상기 풀업과 상기 풀다운을 중지한 후 상기 입출력 선의 전압 레벨은 상기 입출력 전압으로 복귀되며, 상기 전송 신호에 대응하여 상기 입출력 전압과 상기 기준 전압 사이를 스윙하는 상기 펄스 신호를 상기 입출력 선으로 출력하는 비동기 시리얼 통신 시스템.
- 제15 항에 있어서, 상기 반도체 장치는 상기 데이터 입력을 위하여,상기 펄스 신호를 미리 설정된 비교 전압과 비교하여 펄스 신호와 비교 전압의 차에 대응하는 신호를 제공하는 입력 버퍼;상기 입력 버퍼의 출력에 대응하여 동기된 천이 시점을 갖는 펄스를 출력하는 펄스 발생 회로; 및상기 펄스를 이용하여 상기 전송 신호와 동일한 위상을 갖는 데이터를 복원하는 토글 플립플롭;을 포함하는 비동기 시리얼 통신 시스템.
- 제17 항에 있어서,상기 펄스 발생 회로의 상기 펄스가 발생하지 않은 구간이 미리 설정된 시간을 초과하거나 파워업 상태이면 상기 토글 플립플롭을 리셋하는 오류 방지 회로를 더 포함하는 비동기 시리얼 통신 시스템.
- 외부로부터 전송된 전송 신호의 천이 시점에 대응하여 미리 설정된 제1 및 제2 전압 간을 스윙하는 펄스 신호를 입출력 선을 통하여 컨트롤러로부터 수신하며, 상기 펄스 신호를 미리 설정된 비교 전압과 비교하여 펄스 신호와 비교 전압의 차에 대응하는 신호를 제공하는 입력 버퍼;상기 입력 버퍼의 출력에 대응하여 동기된 천이 시점을 갖는 펄스를 출력하는 펄스 발생 회로; 및상기 펄스를 이용하여 상기 전송 신호와 동일한 위상을 갖는 데이터를 복원하는 토글 플립플롭;을 포함하는 반도체 장치.
- 제19 항에 있어서,상기 펄스 발생 회로의 상기 펄스가 발생하지 않은 구간이 미리 설정된 시간을 초과하거나 파워업 상태이면 상기 토글 플립플롭을 리셋하는 오류 방지 회로를 더 포함하는 반도체 장치.
- 입출력 선이 입출력 전압을 유지하도록 하는 입출력 전압 레귤레이터를 가지며, 상기 입출력 전압에 대한 풀업과 풀다운 중 어느 하나를 수행하고, 풀업 신호나 풀다운 신호가 정해진 기준 전압에 도달하면 현재 수행 중인 상기 풀업 또는 상기 풀다운이 종료되며 제1 컨스턴트 펄스를 생성하며, 상기 제1 컨스턴트 펄스의 인에이블 구간 동안 상기 입출력 선을 플로팅하고, 플로팅된 상기 입출력 선에 데이터가 전달되면 상기 데이터를 센싱하여 출력하는 컨트롤러; 및상기 입출력 선의 상기 풀업 신호나 상기 풀다운 신호가 상기 기준 전압에 도달하면 제2 컨스턴트 펄스를 생성하며, 리드된 데이터를 상기 제2 컨스턴트 펄스의 인에이블 구간 동안 상기 입출력 선을 통하여 출력하는 반도체 장치;를 포함하는 비동기 시리얼 통신 시스템.
- 제21 항에 있어서, 상기 컨트롤러는,상기 제1 컨스턴트 펄스의 인에이블이 시작되는 시점에 턴온하여 상기 입출력 선의 상기 데이터를 샘플링하는 제1 스위치;상기 제1 컨스턴트 펄스의 인에이블이 종료되는 시점에 턴온하여 상기 입출력 선의 상기 데이터를 샘플링하는 제2 스위치; 및상기 제1 및 제2 스위치에 의하여 두 번 샘플링된 전압들의 차이를 리드된 상기 데이터로서 출력하는 더블 샘플링 차동 증폭기;를 더 포함하는 비동기 시리얼 통신 시스템.
- 제21 항에 있어서, 상기 반도체 장치는,상기 입출력 선에 대한 상기 풀다운 전압이나 상기 풀업 전압이 상기 기준 전압에 도달하였음을 검출하는 입력 버퍼;상기 입출력 선에 대한 상기 풀다운 전압이나 상기 풀업 전압이 상기 기준 전압에 도달하면 일정한 폭의 상기 인에이블 구간을 갖는 상기 제2 컨스턴트 펄스를 생성하는 펄스 발생 회로;리드된 상기 데이터를 상기 제2 컨스턴트 펄스의 인에이블 구간 동안 상기 입출력 선을 통하여 출력하는 스위치;를 포함하는 비동기 시리얼 통신 시스템.
- 제21 항에 있어서,상기 컨트롤러와 상기 반도체 장치는 동일 레벨의 상기 기준 전압을 감지하여 상기 컨트롤러와 상기 반도체 장치 간의 동기화된 입출력 컨트롤에 이용하는 비동기 시리얼 통신 시스템.
- 제21 항에 있어서,상기 입출력 선의 플로팅 시에 상기 반도체 장치로부터 상기 입출력 선에 전달되는 상기 데이터의 하이와 로우 레벨을 정확하게 센싱하기 위하여 상기 입출력 선과 전원선 사이에 가변 저항을 포함하는 비동기 시리얼 통신 시스템.
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JP2021144772A (ja) * | 2020-03-12 | 2021-09-24 | キオクシア株式会社 | 半導体記憶装置 |
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US11948486B2 (en) | 2022-01-04 | 2024-04-02 | FINDEACHIP Inc. | Integrated circuit having universal asynchronous receiver/transmitter for data communication stability in noise environment |
US11908509B2 (en) * | 2022-03-23 | 2024-02-20 | Micron Technology, Inc. | Apparatus with input signal quality feedback |
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