M16C62A Datasheet, PDF (199/242 Pages) Mitsubishi Electric Semiconductor – SINGLE-CHIP 16-BIT CMOS MICROCOMPUTER

CPU Rewrite Mode (Flash Memory Version)
Mitsubishi microcomputers
M16C / 62A Group (80-pin)
SINGLE-CHIP 16-BIT CMOS MICROCOMPUTER
Full Status Check
By performing full status check, it is possible to know the execution results of erase and program
operations. Figure 1.22.8 shows a full status check flowchart and the action to be taken when each
error occurs.
Read status register
YES
SR4=1 and SR5
=1 ?
Command
sequence error
NO
SR5=0? ^{NO Block erase error}
YES
SR4=0?
NO _{Program error (page}
or lock bit)
YES
SR3=0? ^NO
YES
End (block erase, program)
Program error
(block)
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.
Figure 1.22.8. Full status check flowchart and remedial procedure for errors
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