CN101989243B - Data transmission method between integrated circuits - Google Patents
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- CN101989243B CN101989243B CN200910160957A CN200910160957A CN101989243B CN 101989243 B CN101989243 B CN 101989243B CN 200910160957 A CN200910160957 A CN 200910160957A CN 200910160957 A CN200910160957 A CN 200910160957A CN 101989243 B CN101989243 B CN 101989243B
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Abstract
The invention discloses a data transmission method between integrated circuits. The data transmission method is characterized by utilizing the electrical connection of one pins of two integrated circuits for transmitting command lines and transmitting data, and therefore, the number of packaged pins of the integrated circuits is reduced, the packaging is smaller and the area required by printed circuit boards is reduced. By adopting the invention, the control mode and data transmission among the integrated circuits become simple, and reliable serial transmission can be achieved without a precise system oscillator.
Description
Technical field
The present invention relates to the data transmission method between a kind of integrated circuit, refer to that especially a kind of each pin of two integrated circuit that utilizes is electrically connected, and assigns and data transmission as command line.
Background technology
Serial transmission interface on integrated circuit is a lot of at present, and still general comparatively common has three kinds, and first kind of serial transmission interface is general asynchronous receiving-transmitting transmitter; It belongs to a kind of asynchronous receiving-transmitting transmitter; Need two transmission pins, one is transmission, and another is for receiving; Because belong to non-synchronous transmissions, therefore need a clock source accurately in addition in addition.Second kind of serial transmission interface is I
2C, I
2C needs two transmission pins, and it is respectively serial data and serial clock pulse.The third serial transmission interface is SPI, and it belongs to a kind of four-wire system serial bus interface, and four leads are respectively serial clock pulse (SCLK), mainly go out from going into (MOSI), mainly going into from going out (MISO) and from choosing (SS) signal.
More than three kinds of serial transmission interfaces except the more ic pin of needs; Also need realize this serial transmission structure than complicated circuitry; But in general; The serial transmission interface of some easy control and data transmission does not need above three kinds of so complicated serial transmission structures, increases circuit area and manufacturing cost on foot.
Therefore, how to develop the data transmission method between a kind of integrated circuit, can only utilize each pin of two integrated circuit to be electrically connected; As assigning and the transmission of data of command line; Whereby, save the number of pins of integrated circuit packing, let packing become littler; And save the required area of printed circuit board (PCB), will be that the present invention desires actively to inquire into part.
Summary of the invention
The present invention proposes the data transmission method between a kind of integrated circuit, and its key property is electrically connected for only utilizing each pin of two integrated circuit, as assigning and the transmission of data of command line.
One embodiment of the invention are the data transmission method between integrated circuit, and it utilizes each pin of two integrated circuit to be electrically connected to carry out data transmission, includes the following step:
(1). the current potential of second pin of first pin of one first integrated circuit and one second integrated circuit all is preset as one first current potential; And
(2). when this first integrated circuit detects an external signal, can see the signal of one second current potential off, have an external signal data to prepare to see off so as to notifying this second integrated circuit.
Another embodiment of the present invention is the data transmission method between integrated circuit, and it utilizes each pin of two integrated circuit to be electrically connected to carry out data transmission, includes the following step:
(1). the current potential of second pin of first pin of one first integrated circuit and one second integrated circuit all is preset as one first current potential;
(2). transfer the current potential of this second pin to one second current potential, subsequently and see a plurality of pulses off, wherein said pulse representes to read signal; And
(3). this first integrated circuit is seen a synchronous signal and a data-signal off and is given this second integrated circuit after receiving that this reads signal.
Another embodiment of the present invention is the data transmission method between integrated circuit, and it utilizes each pin of two integrated circuit to be electrically connected to carry out data transmission, and it includes the following step:
(1). the current potential of second pin of first pin of one first integrated circuit and one second integrated circuit all is preset as one first current potential;
(2). transfer the current potential of this second pin to one second current potential, and maintain at least one first schedule time length of this second current potential;
(3). make this first integrated circuit get into dormant state;
(4). whether this first integrated circuit detection at any time has a wake-up signal, the signal when wherein this wake-up signal is reversed to first current potential for this second integrated circuit with this second current potential; And
(5). if this first integrated circuit is received this wake-up signal, then waken up, worked on from this dormant state.
Another embodiment of the present invention is the data transmission method between integrated circuit, and it utilizes each pin of two integrated circuit to be electrically connected to carry out data transmission, includes the following step:
(1). the current potential of second pin of first pin of one first integrated circuit and one second integrated circuit all is preset as one first current potential;
(2). the current potential of this second pin transfers one second current potential to, and is reversed to this first current potential again after remaining on second current potential, one second schedule time length;
(3). this second integrated circuit is seen a plurality of pulses off and is given this first integrated circuit, and a command signal is represented in wherein said pulse; And
(4). this first integrated circuit is carried out different actions according to this command signal.
So, the present invention can only utilize each pin of two integrated circuit to be electrically connected, and as assigning and the transmission of data of command line, saves the number of pins of integrated circuit packing, lets packing become littler, and saves the required area of printed circuit board (PCB).
For letting the above-mentioned feature and advantage of the present invention can be more obviously understandable, hereinafter is special lifts embodiment, and cooperates appended accompanying drawing, elaborates as follows.
Description of drawings
Fig. 1 is a method step figure of the present invention;
Fig. 2 is another method block diagram of the present invention;
Fig. 3 is another method block diagram of the present invention;
Fig. 4 is another method block diagram of the present invention;
Fig. 5 is the first host-host protocol preferred embodiment figure according to the data transmission method between integrated circuit of the present invention;
Fig. 6 is the second host-host protocol preferred embodiment figure according to the data transmission method between integrated circuit of the present invention;
Fig. 7 is the 3rd host-host protocol preferred embodiment figure according to the data transmission method between integrated circuit of the present invention;
Fig. 8 is the 4th host-host protocol preferred embodiment figure according to the data transmission method between integrated circuit of the present invention;
Fig. 9 is the preferred embodiment figure according to the data transmission method between integrated circuit of the present invention.
Reference numeral:
(1)～(2) method step numbering of the present invention
(3)～(5) another method number of steps of the present invention
(6)～(10) another method number of steps of the present invention
(11)～(14) another method number of steps of the present invention
1 first integrated circuit
2 second integrated circuit
The I/O pin
The SIO pin
KEY 1 touch controlled key
KEY n touch controlled key
T0, T1, T2, T3, T4, T5, T6, T7, T10, T11, T20 time point
D0, D1, D2, D3 data
Embodiment
For fully understanding characteristic of the present invention and effect, now through following concrete embodiment, and cooperate appended accompanying drawing, the present invention is done a detailed description, explain as the back:
Fig. 1 is a method step figure of the present invention, please refer to Fig. 1, and the present invention is the data transmission method between a kind of integrated circuit, and it utilizes each pin of two integrated circuit to be electrically connected to carry out data transmission, includes the following step:
(1) current potential with second pin of first pin of one first integrated circuit (for example, touch controlled key detecting device, but be not limited thereto) and one second integrated circuit (for example, microcontroller, but be not limited thereto) all is preset as one first current potential; And
(2) when this first integrated circuit detects an external signal (for example, touching signals, but be not limited thereto), can see the signal of one second current potential off, there is an external signal data to prepare to see off so as to notifying this second integrated circuit.
Fig. 2 is another method block diagram of the present invention, please refer to Fig. 2, and the present invention is the data transmission method between a kind of integrated circuit, and it utilizes each pin of two integrated circuit to be electrically connected to carry out data transmission, includes the following step:
(3) current potential with second pin of first pin of one first integrated circuit (for example, touch controlled key detecting device, but be not limited thereto) and one second integrated circuit (for example, microcontroller, but be not limited thereto) all is preset as one first current potential;
(4) current potential with this second pin transfers one second current potential to, and subsequently and see a plurality of pulses off, wherein said pulse representes to read signal; And
(5) this first integrated circuit is after receiving that this reads signal, sees a synchronous signal and a data-signal (for example, the signal of a button data, but be not limited thereto) off and gives this second integrated circuit.
Fig. 3 is another method block diagram of the present invention, please refer to Fig. 3, and the present invention is the data transmission method between a kind of integrated circuit, and it utilizes each pin of two integrated circuit to be electrically connected to carry out data transmission, includes the following step:
(6) current potential with second pin of first pin of one first integrated circuit (for example, touch controlled key detecting device, but be not limited thereto) and one second integrated circuit (for example, microcontroller, but be not limited thereto) all is preset as one first current potential;
(7) current potential with this second pin transfers one second current potential to, and maintains at least one first schedule time length of this second current potential;
(8) make this first integrated circuit get into dormant state;
(9) whether this first integrated circuit detection at any time has a wake-up signal (for example, the voltage signal of a rising edge, but be not limited thereto), the signal when wherein this wake-up signal is reversed to first current potential for this second integrated circuit with this second current potential; And
(10) if this first integrated circuit is received this wake-up signal, then waken up, worked on from this dormant state.
Fig. 4 is another method block diagram of the present invention, please refer to Fig. 4, and the present invention is the data transmission method between a kind of integrated circuit, and it utilizes each pin of two integrated circuit to be electrically connected to carry out data transmission, includes the following step:
(11) current potential with second pin of first pin of one first integrated circuit (for example, touch controlled key detecting device, but be not limited thereto) and one second integrated circuit (for example, microcontroller, but be not limited thereto) all is preset as one first current potential;
(12) current potential of this second pin transfers one second current potential to, and is reversed to this first current potential again after remaining on second current potential, one second schedule time length;
(13) this second integrated circuit is seen a plurality of pulses off and is given this first integrated circuit, and a command signal is represented in wherein said pulse; And
(14) this first integrated circuit is carried out different actions according to this command signal.
Fig. 5 to Fig. 8 is respectively first to fourth host-host protocol preferred embodiment figure according to the data transmission method between integrated circuit of the present invention; Please, to shown in Figure 8, one first integrated circuit 1 and one second integrated circuit 2 are provided like Fig. 5 respectively with reference to figure 5 to Fig. 8 and cooperate above-mentioned each method step figure; It utilizes a pin each other to link together respectively; In general, the pin that links together preferably need connect one or more than one lifting resistance, its can use external resistive element or in be built in this first integrated circuit 1 or this second integrated circuit 2; When signal does not begin to transmit; The serial transmission pin is high state (high), and those skilled in the art should understand its function mode easily, does not add to give unnecessary details at this.
Because this first integrated circuit 1 and this second integrated circuit 2 have four kinds of transmission modes when doing serial transmission, when transmission does not also begin, the serial transmission pin of these two integrated circuit; This first integrated circuit 1 (for example; Touch controlled key detecting device, but be not limited thereto) pin SIO and this second integrated circuit 2 (for example, microcontroller; But be not limited thereto) pin I/O all be at input pattern; So can see a high state (high) at the serial transmission pin, because after the transmission beginning, this first integrated circuit 1 and this second integrated circuit 2 can be according to different commands or situation at that time; And pin SIO or pin I/O are made as input or output pin, four kinds of host-host protocol examples of the present invention are listed respectively as follows:
As shown in Figure 5; When this first integrated circuit 1 has data will pass to this second integrated circuit 2; This first integrated circuit 1 can be seen a low pulse (low pulse) signal off; Be used for notifying this second integrated circuit 2, this moment, this second integrated circuit 2 can learn that this first integrated circuit, 1 data with existing prepares to see off.
As shown in Figure 6; When this second integrated circuit 2 will read the data of this first integrated circuit 1; This second integrated circuit 2 is 0 o'clock in the time, at first pin I/O is made as the low state (low) of output, in the time of T0; This second integrated circuit 2 see off more than 1 or 1 pulse (clock) afterwards, the pin I/O of this second integrated circuit 2 transfers input to; When this first integrated circuit 1 receives the pulse (clock) more than 1 or 1; At T0 after the time; This first integrated circuit 1 transfers output mode to, for example, T0 after the time up to T7 ... This first integrated circuit 1 can be seen synchronizing signal and data-signal off, by the pin I/O reception of this second integrated circuit 2.D0 among Fig. 6, D1, D2 and D3 are the data-signal that this first integrated circuit 1 is seen off; All the other then are synchronizing signal; Cooperating each data output front and back; Therefore the time that a low state (low) and high state (high) are all respectively arranged can be used for synchronizing signal, lets this second integrated circuit 2 learn when this goes reading of data.
As shown in Figure 7, when this second integrated circuit 2 will be closed this first integrated circuit 1, this second integrated circuit 2 can be made as the low state (low) of output with pin I/O, and continues to surpass at low state the time of T10.This first integrated circuit 1 pin SIO receives the input of a low state, and continues to surpass the time of T10, and this first integrated circuit 1 can get into closed condition; 2 pin I/O see a rising edge wake-up signal off up to this second integrated circuit, wake this first integrated circuit 1 up, and the serial transmission waveform is 0 o'clock in the time; This second integrated circuit 2 is made as the low state (low) of output with pin I/O; Keep low state when pin and surpass the T10 time, this first integrated circuit 1 can get into closed condition, to save the electrical source consumption of itself; Up to the T11 time; This second integrated circuit 2 pulls into high state (high) with pin I/O, and this moment, this first integrated circuit 1 will wake up, worked on.
As shown in Figure 8, when this second integrated circuit 2 will be issued orders to this first integrated circuit 1, this second integrated circuit 2 can be made as the low state (low) of output with pin I/O, and continues to surpass at low state the time of T10.Pin I/O uprises state (high) afterwards by low state (low) in the first time; In the time that arrives T20; This second integrated circuit 2 is seen several pulses (clock) off, and this first integrated circuit 1 will be carried out different commands according to the pulse that is received (clock) number.
Fig. 9 is the preferred embodiment figure according to the data transmission method between integrated circuit of the present invention; Please refer to Fig. 9 and cooperate Fig. 5 to Fig. 8; By shown in Figure 9, it comprises two integrated circuit, and one is microcontroller 2 (MCU); Another is that 1, two integrated circuit of touch controlled key detecting device utilizes a pin each other to link together respectively.Microcontroller 2 (MCU) uses general I/O pin; 1 of touch controlled key detecting device uses realizes serial transmission pin of the present invention; On pin SIO; Build lifting resistance in touch controlled key detecting device 1 and the microcontroller 2 (MCU), not during the low state (low) of output, making has a high state (high) on the serial transmission pin SIO at touch controlled key detecting device 1 and microcontroller 2 (MCU).Two integrated circuit have four kinds of transmission modes when doing serial transmission, when transmission does not also begin; The serial transmission pin of these two integrated circuit all is at input pattern, so can see a high state (high) at pin SIO; Because after the transmission beginning; Touch controlled key detecting device 1 and microcontroller 2 (MCU) are understood according to different commands or situation at that time, and with this pin SIO, are made as input or output pin.Cooperate shown in Figure 5ly, when touch controlled key detecting device 1 has detected touch controlled key KEY 1 to the arbitrary key change of touch controlled key KEY n, can see a low pulse (low pulse) signal off, be used for notifying microcontroller 2 (MCU) to have button to press or decontrol.Microcontroller just goes to read the data that touch controlled key detecting device 1 is seen off after receiving this signal.Cooperate shown in Figure 6; When microcontroller 2 (MCU) will read the key-press status of touch controlled key detecting device 1; Microcontroller 2 (MCU) is 0 o'clock in the time, at first pin I/O is made as the low state (low) of output, in the time of T0; Microcontroller 2 (MCU) see off more than 3 pulse (clock) afterwards, microcontroller 2 (MCU) pin I/O transfers input to; When touch controlled key detecting device 1 receives the pulse (clock) more than 3; After time, touch controlled key detecting device 1 transfers output mode at T0, at T0 after the time; Touch controlled key detecting device 1 can be seen the status signal of synchronizing signal and touch controlled key off, is received by microcontroller 2 (MCU) pin I/O.D0 among Fig. 6, D1, D2 and D3 are the data that touch controlled key detecting device 1 is seen off; Other signals are synchronizing signal, are the time of low state between T1～T2, and reaching between T2～T3 is the time of high state; The time that keeps with D0, D1, D2 and D3 data is the same or be the multiple of D0, D1, D2 and D3 data hold time; So microcontroller 2 (MCU) can utilize inner timer, counts T1～T2, the time of T2～T3; Just can be used for inferring the data hold time of D0, D1, D2 and D3; Cooperating before and after each data output, the time of a low state (low) and high state (high) is all respectively being arranged, therefore can be used for synchrodata when should go time of reading by microcontroller 2 (MCU).Cooperate shown in Figure 7ly, when microcontroller 2 (MCU) will cut out the function of touch controlled key detecting device 1, microcontroller 2 (MCU) can be made as the low state (low) of output with pin I/O, and continues to surpass at low state the time of T20.Touch controlled key detecting device 1 pin SIO receives the input of a low state, and continues to surpass the time of T20, and touch controlled key detecting device 1 can get into touch controlled key is detected closed condition; I/O sees a rising edge wake-up signal off up to microcontroller 2 (MCU) pin, wakes the touch controlled key detection up and closes, when t=0; Microcontroller 2 (MCU) is made as the low state (low) of output with pin I/O; Surpass the T10 time when pin I/O keeps low state, touch controlled key detecting device 1 can get into touch controlled key is detected closed condition, to save the electrical source consumption of itself; Up to the T11 time; Microcontroller 2 (MCU) pulls into high state (high) with pin I/O, and touch controlled key detecting device 1 will wake up at this moment, starts working.Cooperate shown in Figure 8ly, when microcontroller 2 (MCU) will be issued orders to touch controlled key detecting device 1, microcontroller 2 (MCU) can be made as the low state (low) of output with pin I/O, and continues to surpass at low state the time of T10.Pin I/O uprises state (high) afterwards by low state (low) in the first time; In the time that arrives T20; Microcontroller 2 (MCU) is seen several pulses (clock) off, and touch controlled key detecting device 1 will be carried out different commands according to the pulse that is received (clock) number.
Can clearly understand by the above; The present invention provides the data transmission method between a kind of integrated circuit; Can only utilize each pin of two integrated circuit to be electrically connected,, save the number of pins of integrated circuit packing as assigning and the transmission of data of command line; Let packing become littler, and save the required area of printed circuit board (PCB).
Certainly; The present invention also can have other various embodiments; Under the situation that does not deviate from spirit of the present invention and essence thereof; Those of ordinary skill in the art can make various corresponding changes and distortion according to the present invention, but these corresponding changes and distortion all should belong to the protection domain of the appended claim of the present invention.
Claims (11)
1. the data transmission method between an integrated circuit is characterized in that, it utilizes each pin of two integrated circuit to be electrically connected to carry out data transmission, includes the following step:
(1) current potential with second pin of first pin of one first integrated circuit and one second integrated circuit all is preset as one first current potential;
(2) current potential with this second pin transfers one second current potential to, and subsequently and see a plurality of pulses off, wherein said pulse representes to read signal; And
(3) this first integrated circuit is seen a synchronous signal and a data-signal off and is given this second integrated circuit after receiving that this reads signal.
2. the data transmission method between integrated circuit according to claim 1 is characterized in that, this first integrated circuit is a touch controlled key detecting device.
3. the data transmission method between integrated circuit according to claim 1 is characterized in that, this second integrated circuit is a microcontroller.
4. the data transmission method between integrated circuit according to claim 1 is characterized in that, this data-signal is the signal of a button data.
5. the data transmission method between an integrated circuit is characterized in that, it utilizes each pin of two integrated circuit to be electrically connected to carry out data transmission, includes the following step:
(1) current potential with second pin of first pin of one first integrated circuit and one second integrated circuit all is preset as one first current potential;
(2) current potential with this second pin transfers one second current potential to, and maintains at least one first schedule time length of this second current potential;
(3) make this first integrated circuit get into dormant state;
(4) whether this first integrated circuit detection at any time has a wake-up signal, the signal when wherein this wake-up signal is reversed to first current potential for this second integrated circuit with this second current potential; And
(5) if this first integrated circuit is received this wake-up signal, then waken up, worked on from this dormant state.
6. the data transmission method between integrated circuit according to claim 5 is characterized in that, this first integrated circuit is a touch controlled key detecting device.
7. the data transmission method between integrated circuit according to claim 5 is characterized in that, this second integrated circuit is a microcontroller.
8. the data transmission method between integrated circuit according to claim 5 is characterized in that, this wake-up signal is the voltage signal of a rising edge.
9. the data transmission method between an integrated circuit is characterized in that, it utilizes each pin of two integrated circuit to be electrically connected to carry out data transmission, includes the following step:
(1) current potential with second pin of first pin of one first integrated circuit and one second integrated circuit all is preset as one first current potential;
(2) current potential of this second pin transfers one second current potential to, and is reversed to this first current potential again after remaining on second current potential, one second schedule time length;
(3) this second integrated circuit is seen a plurality of pulses off and is given this first integrated circuit, and a command signal is represented in wherein said pulse; And
(4) this first integrated circuit is carried out different actions according to this command signal.
10. the data transmission method between integrated circuit according to claim 9 is characterized in that, this first integrated circuit is a touch controlled key detecting device.
11. the data transmission method between integrated circuit according to claim 9 is characterized in that, this second integrated circuit is a microcontroller.
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| CN101989243B true CN101989243B (en) | 2012-09-05 |
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| CN101211303A (en) * | 2006-12-27 | 2008-07-02 | 明基电通股份有限公司 | Method for electronic system detection display apparatus and related detection device |
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| JPH0675680A (en) * | 1992-07-21 | 1994-03-18 | Advanced Micro Devicds Inc | Key pad scanner mechanism and method for scanning key pad |
| CN1677376B (en) * | 2005-05-10 | 2011-02-16 | 北京中星微电子有限公司 | Data generating device, data receiving device and image-data processing device |
| CN101114830B (en) * | 2007-08-08 | 2011-06-01 | 启攀微电子（上海）有限公司 | State preset circuit |
| CN101419514B (en) * | 2007-10-26 | 2010-10-13 | 无锡华润矽科微电子有限公司 | Wireless mouse communication method |
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2009
- 2009-07-31 CN CN200910160957A patent/CN101989243B/en active Active
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2570888Y (en) * | 2002-09-20 | 2003-09-03 | 王庆文 | Wireless photoelectric mouse |
| CN101211303A (en) * | 2006-12-27 | 2008-07-02 | 明基电通股份有限公司 | Method for electronic system detection display apparatus and related detection device |
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Effective date of registration: 20190523 Address after: 10 Xinzhuyuan Building, No. 4 Xinzhu Road, Songshan Lake, Dongguan City, Guangdong Province (Building No. 10, No. 1, Headquarters) Patentee after: Holtek semiconductor (China) Co. Ltd. Address before: Hsinchu City, Taiwan, China Patentee before: Shengqun Semiconductor Co., Ltd. |
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