KR100429607B1 - Device and method for transmitting data in wireless telephone - Google Patents

Abstract

The present invention provides a data transmission device of a portable telephone, a register for storing data, used during execution of a program, and capable of fast access; An arithmetic unit for performing arithmetic and logical operations; A control unit for controlling the flow of data between units inside the computer required to interpret and execute instructions; a microprocessor capable of inputting and outputting only 8-bit or 16-bit data, and a memory for storing programs and data for processing programs A data bus that is a bidirectional signal line used for data transfer between the microprocessor, memory, and input / output, a microbus and a memory are connected to transmit a memory address, and In addition, it is characterized by comprising an address bus for transmitting data to the display unit and a diode provided in the address bus for transmitting the data.

Description

DEVICE AND METHOD FOR TRANSMITTING DATA IN WIRELESS TELEPHONE}

The present invention relates to a portable terminal, and more particularly, to a data transmission apparatus and method for a portable telephone for outputting 16-bit or more data in one cycle.

The data bus of the microprocessor that transfers data to the display of the portable telephone is fixed to transfer only 8-bit or 16-bit data. Therefore, in the case of transmitting bits larger than 8 bits or 16 bits fixed to the data bus, the data bus of the microprocessor must be reconfigured or the bits must be divided and transmitted to the portable telephone in two or more cycles in order to extend the data bus. For example, a display unit of a portable telephone having a 16-bit configuration of one pixel outputs 65k colors as 16-bit data is transmitted in one cycle through the data bus. However, in the display unit of a 18-bit mobile phone with 1 pixel configuration, 260k colors are output by sending 16 bits first through the data bus and then sending 18 bits in two cycles of sending the remaining 2 bits.

If 18-bit data is transmitted in two cycles through the data bus as described above, if the microprocessor can be accessed at a fairly high speed, it does not cause a big problem, but if the microprocessor is accessed at the display of the portable telephone at a slow speed, There was a problem in the output speed of 1 cycle and 2 cycles, the output speed on the screen is slower, there was a fear that lockup, etc. occur.

Accordingly, an object of the present invention is to provide an apparatus and method capable of outputting data in one cycle without reconfiguring for expansion of a data bus when transmitting 16 bits or more of data to a display unit of a portable terminal.

A register to which a data transmission device of a portable telephone for achieving the above object stores data, is used during execution of a program, and has fast access; An arithmetic unit for performing arithmetic and logical operations; A control unit for controlling the flow of data between units inside the computer required to interpret and execute instructions; a microprocessor capable of inputting and outputting only 8-bit or 16-bit data, and a memory for storing programs and data for processing programs A data bus that is a bidirectional signal line used for data transfer between the microprocessor, memory, and input / output, a microbus and a memory are connected to transmit a memory address, and In addition, it is characterized by comprising an address bus for transmitting data to the display unit and a diode provided in the address bus for transmitting the data.

In order to achieve the above object, when the data transmission method of the portable telephone outputs data of 16 bits or more, a process of inputting address address information of a memory having data to be output, and data corresponding to the address address of the input memory is performed. A process of selecting, outputting the selected 16-bit or more data to a data buffer, storing the 16-bit or more data output to the data buffer in a variable A, and using a shift operation, Removing the lower 16-bit data from the 16-bit or more data and matching the remaining upper bit data to the address bus to which the data is to be transmitted, and then calculating the OR with the address value to which the data is to be transmitted and storing the result in variable B; The maximum value of the memory chip which has more than 16 bits of data stored in A and the data to be output is logic. The lower 16-bit data calculated by the product is transmitted through the data bus, and the data stored in the variable B is simultaneously transmitted to the display through the address bus to which the data is to be transmitted.

1 is a diagram showing a configuration of an apparatus for transmitting data to a display portion of a portable telephone according to an embodiment of the present invention.

2 is a flowchart in which a data bus and an address bus simultaneously perform data transmission when data is transmitted to a display unit of a portable telephone according to an embodiment of the present invention.

3 is a diagram illustrating a method of reading data from a display unit by a microprocessor of a portable telephone for removing a leakage magnetic field according to an exemplary embodiment of the present invention.

DETAILED DESCRIPTION A detailed description of preferred embodiments of the present invention will now be described with reference to the accompanying drawings.

According to an embodiment of the present invention, a data transmission apparatus will be described assuming a portable telephone. However, the apparatus and method according to the embodiment of the present invention can be equally applied to general communication devices that transmit and output data in addition to the portable telephone.

1 is a block diagram of an apparatus for transmitting data to a display unit of a portable telephone according to an embodiment of the present invention. 1 shows that 18 bits of data are transmitted to the display unit.

Referring to FIG. 1, the microprocessor 100 performs a function of controlling the overall operation of the portable telephone. That is, it reads each name of the program from memory, interprets it, decides what data should be processed, executes it, and decides the next command to be executed. The microprocessor is composed of a register 101, an operation unit 102, and a control unit 103. The devices are also connected to each other, and are also connected to the input / output port and the memory by a data bus. The register 101 is a small memory for storing data and is used during execution of a program, and allows fast access. In addition, according to an embodiment of the present invention, a variable value is stored when the arithmetic unit 102 calculates the 16-bit or more data so that 16-bit or more data is output through the data bus and the address bus in one cycle. The computing device 102 performs arithmetic operations such as addition and multiplication. It also performs the same operation as the AND operation between one or two values in the register. Further, according to an embodiment of the present invention, the 16-bit or more data is calculated so that 16-bit or more data is output through the data bus and the address bus in one cycle. The control device 103 controls the flow of data between each unit inside the portable telephone necessary to interpret the command and execute it. In addition, according to an embodiment of the present invention, the register 101 and the calculation unit 102 are controlled so that 16 bits or more of data is output through the data bus and the address bus in one cycle.

The memory 120 may be composed of a program memory and a data memory. The program memory may store programs for controlling a general operation of the portable telephone, and the data memory temporarily stores data generated during the execution of the programs. It is also used by the microprocessor and stores instructions or data of the microprocessor. The memory includes random access memory (RAM) and read only memory (ROM).

The display unit 130 displays the state being performed under the control of the microprocessor 100 and the key operation state of the user when performing a call function. Further, according to the embodiment of the present invention, data can be accessed with 16 bits or more, and data of 16 bits or more is received and displayed in one cycle by the data bus and the address bus.

The data bus 140 is a bidirectional signal line used for data transmission between the microprocessor, memory, and input / output. The address bus 150 transmits a memory address by connecting the microprocessor 100 and the memory 120, or simultaneously transmits the remaining bits to the display unit 130 when the data bus 140 transmits 16-bit data to the display unit. The diode 160 is installed in the address bus 151 for transmitting data in order to prevent the microprocessor 100 from reading data from the display unit 130 through the address bus 151 for transmitting data. The key input unit 170 includes keys for inputting numeric and character information and function keys for setting various functions.

Referring to FIG. 1, when 16-bit or more data is transmitted to a display unit of a portable telephone, first, an address bus 151 which is not used or is appropriate for timing data transmission to the display unit 130 of the address bus 150 may be arbitrarily set according to a reverse voltage. Install diode to prevent leakage current.

The address address information of the memory having data to be output to the display unit 130 is input to the address address 150 by the operation of the key input unit 170. The decoder of the microprocessor 100 selects the address of the memory input to the address 150 and outputs the data of the selected address to the data buffer of the microprocessor 100 through the buffer of the memory 120. The control unit 103 of the microprocessor controls the register 101 and the operation unit 102 to separate 16-bit or more data stored in the data buffer into lower 16-bit data to be transmitted by the data bus and the remaining higher bits to be transmitted by the address bus. The data bus 140 and the address bus 150 simultaneously transmit data of 16 bits or more to the display unit 130.

2 is a flowchart in which a data bus and an address bus simultaneously perform data transmission when data is transmitted to a display unit of a portable telephone according to an exemplary embodiment of the present invention. The Figure in the embodiment of Figure 2 CS (Chip Selection) is 0x00000 ~ sends data of 0x20FFF of 18 bits to output a 260k color on the display unit of the portable telephone used by 0x0FFFF, address bus A ₀ ~ A ₁₇ of A ₂ It describes a a ~ ₃ as an address bus to transfer data. The address bus for transferring the data can select an address bus whose timing is not appropriate or used when the data bus is transferring data to the display unit.

An embodiment of the present invention will now be described in detail with reference to FIG. 1.

In operation 200, the address address information of the memory having data to be output to the display unit 130 is input to the address addresses A ₀ to A ₁₇ 150 by the operation of the key input unit 170. In operation 210, the decoder in the microprocessor 100 selects an address address input to the address addresses A ₀ to A ₁₇ 150 from the memory 120. The data of the address of the selected memory 120 is output to the data buffer of the microprocessor 100 through the buffer of the memory 120 in step 220.

In operation 220, the 18-bit data 0x2FFF stored as the data buffer is stored in the variable A of the register 101 in operation 230. The controller 103 controls the register 10 and the arithmetic unit 102 in operation 240 to calculate 0x2FFF stored in the variable A of the register 101 in operation 230. First, 0x2FFF is shifted right by 15 to remove the lower 16 bits, 0x0FFF. Shift the left two bits 0x2 left by two to align the address buses A ₂ to A ₃ 151. Thereafter, the data is calculated by performing a logical OR with Addr, which is an address value of the address buses A ₂ to A ₃ , and stored in the variable B of the register.

In step 250, 0x20FFF stored in variable A in operation 230 is logically multiplied with 0x0FFFF, which is the maximum value of a memory chip that has data to be output on display 130, and the lower 16-bit data 0x0FFF, and in step 240, variable B Output stored data at the same time.

In step 250, the data stored in the variable B in step 240 is transmitted through the address buses A ₂ to A ₃ 151, and the lower 16-bit data 0x0FFF is simultaneously transmitted to the display unit 130 via the data bus 140 to be displayed.

Since the address bus 150 is only for output, leakage current occurs due to reverse voltage when data is read. Therefore, the diode 160 installed in the address buses A ₂ to A ₃ 151 which transmits data prevents the microprocessor 100 from reading the data from the display unit 130 via the address buses A ₂ to A ₃ 151 which transmits the data. prevent.

However, the diode 160 may be removed if the microprocessor 100 does not need to read the display unit 130, or if the data D ₁₆ to D ₁₇ of the display unit 130 read only the port.

3 illustrates a method of reading data from a display unit by a microprocessor of a portable telephone for removing a leakage magnetic field according to an exemplary embodiment of the present invention.

When the microprocessor 100 performs read access from the display unit 130 through address buses A ₂ to A ₃ 151 in a logic high state, data is output through the address buses A ₂ to A ₃ 151. ((D ₁₆ ~ D ₁₇ ) will be output as Logic Low or Logic High.

At this time, there is no problem when the data D16 to D17 are output at logic high, but when output is logic low, the address bus A ₂ to A output is logic high. ₃ 151 is forced to logic low, causing leakage current and abnormal operation.

To prevent this, as shown in FIG. 3, when the microprocessor 100 reads data of the display unit 130, the microprocessor 100 may read data of address addresses A ₂ to A ₃ to be read in step 300. Specify. Data 0x20000 of the selected address A ₂ to A ₃ is stored in variable C of register 101 in step 301. The controller 103 controls the register 101 and the arithmetic unit 102 in step 302, and calculates the data 0x20000 of the address addresses A ₂ to A ₃ stored in the variable C of the register 101 in a logical product by 0x0FFF3 in step 301. (A ₂ ~ A ₃ ) Make the value '0'.

As described above, the address buses A ₂ to A ₃ 151 are outputted at logic low, so that the output of the display unit 130 according to the read is related to logic low or logic high. Normal operation is possible without

That is, as described above, the present invention can increase the speed output on the screen without reconfiguration for the expansion of the data bus by transmitting 16-bit or more data to the display unit of the portable telephone in one cycle through the data bus and the address bus. have.

In addition, by providing a diode in the address bus for data transmission, there is an effect that can prevent the leakage current due to the reverse voltage generated during data read through the address bus for data transmission.

Claims (2)

In the data transmission device of a portable telephone, Registers for storing data and used during execution of the program and capable of fast access; An arithmetic unit for performing arithmetic and logical operations; A microprocessor configured to control the flow of data between units inside a computer required to interpret and execute instructions; Memory that stores programs and data that processes them, A display that can be accessed with data of 16 bits or more, A data bus which is a bidirectional signal line used for data transmission between the microprocessor, memory, and input / output, An address bus which connects the microprocessor and a memory to transmit a memory address and to transmit data to the display unit together with the data bus; And a diode installed in the address bus for transmitting the data in order to prevent the microprocessor from reading data through the address bus for transmitting the data. In the data transmission method of the portable telephone, In case of outputting data more than 16 bits, the address address information of the memory where the data to be output is inputted; Selecting data corresponding to the address of the input memory; Outputting the selected 16-bit or more data to a data buffer; Storing at least 16 bits of data output to the data buffer in variable A; By using a shift operation, the lower 16-bit data is removed from the 16-bit or more data stored in the variable A, and the remaining upper-bit data is aligned with the address bus to which data is to be transmitted, and then the operation is performed by performing a logical OR with the address value to be transmitted. To store in variable B, The lower 16-bit data obtained by performing a logical product on the 16-bit or more data stored in the variable A and the maximum value of the memory chip having the data to be output is via a data bus, and the data stored in the variable B is an address bus to which data is transferred The data transmission method of a portable telephone, characterized in that the process of transmitting to the display at the same time through.