M30620FCAFP datasheet(255/274 Pages) MITSUBISHI

255 / 274 page

Appendix Standard Serial I/O Mode 1 (Flash Memory Version)

Mitsubishi microcomputers

M16C / 62A Group

SINGLE-CHIP 16-BIT CMOS MICROCOMPUTER

255

Full Status Check

Results from executed erase and program operations can be known by running a full status check. Figure

1.29.20 shows a flowchart of the full status check and explains how to remedy errors which occur.

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.

Figure 1.29.20. Full status check flowchart and remedial procedure for errors

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