M30620FCAFP datasheet(251/615 Pages) RENESAS

251 / 615 page

CPU Rewrite Mode (Flash Memory Version)

Mitsubishi microcomputers

M16C / 62A Group

SINGLE-CHIP 16-BIT CMOS MICROCOMPUTER

1-232

Read status register

SR4=1 and SR5

=1 ?

Command

sequence error

YES

SR5=0?

YES

Block erase error

SR4=0?

YES

Program error (page

or lock bit)

SR3=0?

YES

Program error

(block)

End (block erase, program)

Execute the clear status register command (5016)

to clear the status register. Try performing the

operation one more time after confirming that the

command is entered correctly.

Should a block erase error occur, the block in error

cannot be used.

Execute the read lock bit status command (7116)

to see if the block is locked. After removing lock,

execute write operation in the same way. If the

error still occurs, the page in error cannot be

used.

After erasing the block in error, execute write

operation one more time. If the same error still

occurs, the block in error cannot be used.

Note: When one of SR5 to SR3 is set to 1, none of the page program, block erase,

erase all unlock blocks and lock bit program commands is accepted. Execute the

clear status register command (5016) before executing these commands.

Full Status Check

By performing full status check, it is possible to know the execution results of erase and program

operations. Figure 1.26.8 shows a full status check flowchart and the action to be taken when each

error occurs.

Figure 1.26.8. Full status check flowchart and remedial procedure for errors

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