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7641

SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER

Mitsumi 

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Full Status Check

Results from executed erase and program operations can be

known by running a full status check. Figure 116 shows a flow-

chart of the full status check and explains how to remedy errors

which occur.

MITSUBISHI MICROCOMPUTERS

7641 Group

SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER

Read status register

SR4 = 1 and YES

SR5 = 1 ?

Command

sequence error

NO

NO

SR5 = 0 ?

YES

NO

SR4 = 0 ?

YES

Erase error

Program error

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 an erase error occur, the block in error

cannot be used.

Should a program error occur, the block in error

cannot be used.

End (Erase, program)

Note: When one of SR5 to SR4 is set to “1” , none of the program, erase all blocks,

and block erase commands is accepted. Execute the clear status register

command (5016) before executing these commands.

Fig. 116 Full status check flowchart and remedial procedure for errors

135

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