KR970005646B1 - One time programmable coding device and method - Google Patents

Abstract

One time programmable coding unit and a method thereof are provided, in which one time programmable coding repeats several tens of times in response to memory capacity and one time programmable coded data can be read out. The one time programmable coding unit includes a first power source generator(10) for outputting DC voltage of 12V by reducing the pressure of a predetermined input voltage and rectifying the predetermined input voltage, a second power source generator(20) for outputting DC voltage of 5V by reducing the pressure of the DC voltage of 12V of the first power source generator(10), a chip socket(30) for inserting one time programmable for coding, a microprocessor(70) for storing data coding and reading steps in the one time programmable inserted into the chip socket(30) in a form of program and controlling the overall system, an oscillating circuit(60) for driving the microprocessor(70), a switch(40) for supplying DC voltage of 12V of the first power source generator(10) to the chip socket(30) under the control of the microprocessor(70), and an external computer(80) connected with an input/output control terminal of the microprocessor(70), for transferring a control signal to read one time programmable coding data and coded data.

Description

One-time programmable coding device and method

1 is a detailed circuit diagram of a one-time programmable coding device according to the present invention.

2 is a flowchart of a one-time programmable coding process of a microcomputer according to the present invention, (a) is a flowchart of a mode determination process, (b) is a flow chart of a read mode, (c) a flow chart of a write mode, (d) is process flow chart in reuse mode.

3 is an operation timing chart diagram according to the present invention, (a) is an operation timing chart diagram in read mode, and (b) an operation timing chart diagram in write mode.

4 is an address structure diagram of a one-time programmable according to the present invention.

* Explanation of symbols for main parts of the drawings

10: first power generator 11, 21: constant voltage circuit

20: second power generator 30: chip socket (one time programmable)

40: switching unit 50: reset circuit

60: oscillation circuit 70: micom

80: external computer

The present invention relates to a one-time programmable coding apparatus and a method thereof, and more particularly, to a one-time programmable coding apparatus and method capable of repeating a one-time programmable coding dozens of times according to a memory capacity, as well as reading the content coded in the one-time programmable. It is about.

In general, One Time Programmable Coding (OTP) coding equipment is a device that records one-time programmable data or programs, and is widely used in schools and laboratories for experimenting by storing specific programs in one-time programmable.

However, since the conventional one-time programmable coding apparatus is a one-chip that can be used only once as defined by the term, only one coding is possible regardless of the capacity of the internal memory, and even if there is a remaining amount, It can't be used and the coded data (programs) can't be read, requiring a separate reading device.

Therefore, considering that the price of the one-time programmable is considerably higher than that of other semiconductor chips, a large amount of budget is wasted in schools or laboratories that consume a large amount of time, resulting in a decrease in reliability of the one-time programmable coding device.

The present invention configures a one-time programmable coding apparatus with a simple circuit including a microcomputer to solve such a problem, and gives a predetermined program to the microcomputer so that coding and reading can be selectively performed by an external computer. On the other hand, the present invention provides a one-time programmable coding device and a method for making the most of the one-time programmable of the object to be coded by allowing the code to be repeated dozens of times until the data to be coded reaches the memory capacity of the one-time programmable object of the present invention. Is there.

According to an aspect of the present invention, there is provided a one-time programmable coding device for coding data in a one-time programmable device, comprising: a first power supply unit configured to output a DC 12V voltage by reducing and rectifying a predetermined input voltage; A second power generator for depressurizing the DC 12V power supply of the generator and outputting a DC 5V voltage, a chip socket into which the one-time programmable target is inserted, and a series of processes of coding and reading data into the one-time programmable inserted into the chip socket A microcomputer, which is stored as a program and controls the entire system, an oscillation circuit for driving the microcomputer, and a switching unit for supplying a DC 12V power supply of a first power generation unit to a chip socket into which a one-time programmable target is inserted according to the control of the microcomputer. Connected to the input / output control terminal of the microcomputer for one-time programmable coding It has been made in an external computer to transmit the control signal for reading the data iterator and coding is completed.

In addition, the present invention provides a coding method of a one-time programmable device including a first socket and a second power generator chip socket, a microcomputer, an oscillator circuit, a switching unit, and an external computer, comprising: determining whether data is present at an address when selecting a reuse mode ( Step 502), after the step of determining whether there is a program to operate independently (step 503), and if there is a program to operate independently after the step, determining whether old data and new data match (step 504). If the data match in the above step, the data is stored; if the data do not match, the recorded data is cleared (steps 505 and 506). Step of recording sequentially (step 507), it is determined whether it is the last address after the step Is made of a terminating when the dress (step 508), the step (step 507) after which the steps to determine the completion status of the data storage continues to perform data recording if the data storage is not complete.

Hereinafter, described in detail by the accompanying drawings as follows.

1 is a detailed circuit diagram of a one-time programmable coding apparatus according to the present invention, in which the first power generator 10 includes a constant voltage circuit 11, a capacitor C1, C2, and a diode D1, D2. When the power is applied to the first power generation unit 10, after the smoothing by the capacitor (C1), and generates a DC 12V voltage by the constant voltage circuit 11 and the diode (D1) (D2).

The DC 12V output generated by the first power generator 10 is again passed through the second power generator 20 formed of the constant voltage circuit 21 and the capacitor C3 at the rear stage to output the DC 5V power and oscillate. It is supplied to the circuit 60, the chip socket 30, the microcomputer 70 to be operable, two between the output terminal of the first power generating section 10 and the clear terminal (MCLR) of the chip socket 30. The first and second transistors TR1 and TR2 of the switching unit 40 connected in series are connected to the chip socket according to the output signal (high signal) of the sixth control terminal RC5 of the microcomputer 70. 30) DC 12V power supply and cut off, and its DC 12V power supply acts as a definitive control signal when coding and reading in one-time programmable.

In addition, the external computer 80 is connected to the first to eighth control terminals RC0 to RC7 of the microcomputer 70 to exchange data during coding and reading, and the input / output terminal RA0 of the chip socket 30. The first to eighth controls of the microcomputer 70 control the coding data transmitted from the external computer 80 at the time of coding when the first to eighth input and output terminals RA0 to RA7 of the microcomputer 70 are connected to each other. The one-time programmable data that is transferred to the chip socket 30 through the terminals RC0 to RC7 and the first to eighth input and output terminals RA0 to RA7, and placed in the chip socket 30 at the time of reading, is transferred to the chip socket 30. After input to the microcomputer 70 through the input and output terminals (RA0 to RA7) and the first to eighth input and output terminals (RA0 to RA7) of the microcomputer 70, the first to eighth control terminals (RC0 to RC7) again. It is transmitted to the external computer 80 via the reading is possible.

In the one-time programmable coding, data recording and reading processes, as well as device control and unique numbers such as oscillation selection and protection can be coded, which is executed by a program stored in the microcomputer 70, where the chip socket, The one-time programmable code of the coding target inserted into the chip socket is mixed with 30 and used.

2 is a flowchart of a one-time programmable coding process of the microcomputer according to the present invention, and FIG. 3 is a time chart diagram according to each process.

The present invention made as described above will be described in detail with reference to FIGS. 1 to 3 as follows.

First, the one-time programmable is inserted into the chip socket 30, and then the system is started as shown in FIG. 2 (a), and a high signal is output from the sixth control terminal RC5 of the microcomputer 70 to output the first signal of the switching unit 40. The first and second transistors TR1 and TR2 are turned on to apply the DC 12V power supply of the first power generator 10 to the clear terminal of the one time programmable 30 to perform the initialization process L1 for initializing the one time programmable. do.

Thereafter, the microcomputer 70 reads the signal output from the external computer 80 to determine whether the read mode (step 101), the write mode (step 201), the device control mode (step 301), or the unique number input mode (step 401). The mode determination process (L2) for determining is performed, and the following description will be described in detail for each mode.

First, as shown in (b) of FIG. 2, in the read mode (step 101) in the mode determination process L2, the third through the first to eighth input / output terminals RA0 to RA7 of the microcomputer 70 are used. When the data for the read mode is transmitted (step 102) to the one-time programmable 30 as shown in (A) of FIG. (A), the one-time programmable 30 switches to a mode in which the data is output and is in a standby state. do.

Thereafter, a low signal is output from the sixth control terminal RC5 of the microcomputer 70 to turn off the first and second transistors TR1 and TR2 of the switching unit 40. As shown in (A) of FIG. 3 (a), DC 12V power is supplied (step 105), and a high signal is output from the third control terminal RC2 of the microcomputer 70 to display ((a) of FIG. After supplying DC 5V power to the one-time programmable 30 (step 104) as shown in B), the oscillation frequency as shown in (D) of FIG. 3 (a) is obtained from the second control terminal RC1 of the microcomputer 70. The oscillation terminal (OSC) of the one-time programmable 30 is supplied to the oscillation terminal (OSC) (step 106), and its oscillation frequency is one-time programmable for a certain period of oscillation frequency which is raised to a high level again (step 106) after being delayed for a predetermined time (step 108). In step 30, an address is increased by one each time an oscillation frequency such as (D) of (a) is applied to the one-time programmable 30.

Therefore, when the oscillation frequency specifying the address becomes high level as shown in (E) of FIG. 3 (a), data existing in the designated address of the one-time programmable 30 is stored in the one-time programmable input / output terminals RA0 to RA7 and the first. To the microcomputer 70 through the eighth input / output terminals RB0 to RB7 (step 107), and the data thereof is sent back to the external computer 80 via the first to eighth control terminals RC0 to RC7. By checking the data and program coded in the one-time programmable 30, the microcomputer 70 determines whether the memory address of the one-time programmable 30 is the end, that is, the last address every time the address is increased ( Step 109), it exits the read mode in the case of the last address and returns to step 106 in which the oscillation frequency is supplied to continuously increase the address if the address still exists. And will be continued to the coded data in one-time programmable (30) repeatedly reads.

Next, the case of the write mode (step 201) in the mode determination process L2 will be described with reference to (c) of FIG. 2, first from the fourth control terminal RC3 of the microcomputer 70 (b). As shown in (C), a high signal in the read mode is applied to the one-time programmable 30 (step 202), and then a high signal is output to the third control terminal RC2 of the microcomputer 70, thereby as shown in FIG. As shown in (B), the power supply of DC 5V is supplied to the one-time programmable device 30 (step 203), and then a low signal is output from the sixth control terminal RC5 of the microcomputer 70 to display the first and the first switches of the switching unit 40. As the second transistors TR1 and TR2 are turned off, the DC 12V power supply is cut off as shown in (C) of FIG. do.

Thereafter, a clock such as (C) of FIG. 3B is supplied from the third control terminal RC2 of the microcomputer 70 to the RTCC terminal of the one-time programmable 30 (step 205), and the clock thereof is high to low. Immediately before dropping, the oscillation frequency from the second control terminal RC1 to the oscillation terminal OSC of the one-time programmable 30 is supplied to the oscillation terminal OSC of the one-time programmable 30 (step 209). When the frequency rises to a high level, data output (step 210) is checked.

On the other hand, when the storage of one bit of data is completed, it is determined whether the memory address of the one-time programmable 30 is the end, that is, whether it is the last address (step 212). In order to continue to increase the address, the process returns to step 205 of supplying the oscillation frequency to repeat the write operation of the coded data output from the external computer 80.

4 is a structural diagram of a one-time programmable (ROM) according to the present invention. In the first address, information about a system, that is, device control such as oscillation selection and protection, can be stored. It is possible to code, and since the coding method proceeds to a similar process as described above, the description is omitted.

Next, referring to the case of the reuse mode (step 501) in the mode determination process L2 according to (a) of FIG. 2, first, the first to eighth control terminals RC0 of the microcomputer 70 from the external computer 80 are described. When the control signal for the reuse mode is applied through ˜RC7, the microcomputer 70 passes through the first to eighth input / output terminals RB0 to RB7 to determine whether data exists at an address in the one-time programmable 30. As in d) (step 502), if there is data in the one-time programmable 30, it is determined whether there is a program that operates independently for the storage of new data (step 503). Comparing the stored data with each other (step 504), the old data portion and the old data portion that do not match the new data are all cleared to zero (step 505), and the old data and the new data are cleared. The portion where the data coincides with each other further improves the utilization of the one-time programmable 30 by continuously storing the data (step 506).

Thereafter, in step 503, there is no program to operate independently, or after the data clearing and data preserving processes of steps 505 and 506, the data is sequentially recorded by increasing the address (step 507). It is determined whether the address of 30) is the last (step 508). If the address of the one-time programmable 30 is the last address that can no longer store data, the reuse mode is terminated, and the completion of data storage is determined in the state where the address exists. At step 509, the re-use mode is terminated, but if data storage is not completed, the data recording process of step 507 is continued.

On the other hand, if the read mode (step 101) is executed by executing the mode determination process (L2) from the external computer 80 after completion of the reuse mode, the previous data cleared to 0 in step 505 is immediately read from the address where the new data is stored. Start reading to increase data throughput.

As described above, the present invention constitutes a one-time programmable coding apparatus including a first socket and a second power generator, a chip socket into which a one-time programmable object to be coded is inserted, a microcomputer, an oscillator circuit, a switching unit, and an external computer. By assigning a predetermined program to the microcomputer, the coding and reading can be selectively performed by an external computer, and the coding is performed by allowing several times repetitive coding until the data to be coded reaches the memory capacity of the one-time programmable. By making the most of the target one-time programmable, it is possible to greatly improve the reliability and economic savings of the one-time programmable coding device.

Claims (2)

In a one-time programmable coding apparatus for coding data in a one-time programmable, the first power generator 10 and a DC 12V power supply of the first power generator 10 outputting a DC 12V voltage by reducing and rectifying a predetermined input voltage. Coding and reading data to the second power generator 20 for outputting a DC 5V voltage by decompressing the voltage, the chip socket 30 into which the one-time programmable target is inserted, and the one-time programmable inserted into the chip socket 30. A series of processes are stored as a program, and the first power generator 10 is controlled by the microcomputer 70 for controlling the entire system, the oscillation circuit 60 for driving the microcomputer 70, and the microcomputer 70. 1) DC 12V power supply to the chip socket 30 into which the one-time programmable target is inserted. The switching unit 40 is connected to the input / output control terminal of the microcomputer 70 for one-time programmable coding. And an external computer (80) for transmitting a control signal to read the coded data. A coding method of a one-time programmable device comprising a first and a second power generator chip socket, a microcomputer, an oscillator circuit, a switching unit, and an external computer, the method comprising: determining whether data is present at an address when selecting a reuse mode (step 502); Determining whether there is a program that operates independently after the step (step 503), and if there is a program that operates independently after the step, determining whether old data and new data match (step 504), in the step If the data matches, the data is stored; if the data does not match, the recorded data is cleared (steps 505 and 506), and if the program does not operate independently, the data is recorded sequentially according to the address increase. Step 507, it is determined whether it is the last address after the step; End comprising: (step 508), the coding method of the one-time programmable consisting of steps (step 507) after which the steps to determine the completion status of the data storage continues to perform data recording if the data storage is not complete.