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How to program on chip flash memory with M16C Flash Starter (M3A-0806)?

Latest Updated:03/01/2005

Question:

(Flash Memory)   I am programming the on-chip flash memory with the M16C Flash Starter (M3A-0806). The first time I programmed the memory, I entered "all 00h" as the ID code and everything worked successfully. However, any subsequent times I entered "all 00h" as the ID code, I got a "Not match ID" error and reprogramming would not occur. What is the problem? [2005/03/01]

Answer:

The ID code is set in advance when the program in which the user set the ID code to addresses FFD4h to FFDAh is written to the flash memory. The ID in the M3A-0806 ID verification screen is used to verify the ID written to the flash memory. The ID the user inputs on this screen will not be written to the flash memory.

The first time the on-chip flash memory is programmed, ID verification will be successful no matter what value is input as the ID code in the ID verification screen (a value must be entered). If data has already been written to the flash memory, the value input in addresses FFD4h to FFDAh will become the ID code (including "FFh"). If you don't know the ID code, you can confirm it by looking up the value in addresses FFD4h to FFDAh in the HEX file of the program written to the on-chip flash memory. Note that if there are no existing values in addresses FFD4h to FFDAh of the HEX file, the ID code will be "FFh".

When ID match fails, reboot M3A-0806 and the MCU power supply.

Refer here for more on M3A-0806.

(#104885)

Suitable Products
3803H
3803L
3850A
38D2
38D5
M3A-0806