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4. HOW TO WRITE THE PROGRAM
This chapter describes programming conditions and the programming procedure with a PROM programmer.
For the operation of the PROM programmer, refer to the instructions of the PROM programmer.

4.1 PROGRAMMING CONDITIONS

Programming conditions are shown here below.
Device name of PROM programmers: M5M27C256A (Made by Mitsubishi)
Programming voltage: Vpp = 12.5V

4.2 PROGRAMMING PROCEDURE

Follow these procedures (1) through (6) to write the program into the MCU.
(1) Read the program.
Read the program into the PROM programmer.
(2) Attach the adapter to the PROM programmer. (See Section 4.3)
(3) Insert the MCU into the programming adapter. (See Section 4.4)
(4) Check to erase the programming area. *
Using the PROM programmer's erase check function, check whether
data can be written into the MCU's programming area.
(5) Write the program into the MCU. *
Write the program into the program area of the MCU using the PROM
programmer.
(6) Check to verify the programming area. *
Check to verify the programming area of the MCU using the PROM
programmer. Check whether the program is written into the MCU
correctly.
Note:
* Some PROM programmers perform the procedures (4) through (6) written above automatically.