M32CSLASH8B datasheet(337/406 Pages) RENESAS

337 / 406 page

Under development

M32C/8B Group

23. Flash Memory

Preliminary specification

Specifications in this manual are tentative and subject to change.

REJ09B0450-0050 Rev.0.50 Oct 31, 2008

Page 320 of 385

Start

FMR06 = 1

and

FMR07 = 1?

YES

FMR07 = 0 ?

YES

Erase error

End

Command sequence error

FMR06 = 0 ?

YES

Program error

(1) Execute the clear status register command to set bits FMR06 and FMR07 to 0

(successfully completed).

(2) Check if the command is written correctly and execute the correct command.

(1) Execute the clear status register command to set the erase status flag to 0

(successfully completed).

(2) Execute the read lock bit status command. Set the FMR02 bit in the FMR0

occurred is set to 0 (locked).

(3) Execute the block erase command again.

NOTE:

1. If an error still occurs, the block in error cannot be used.

[When a program operation is executed]

(1) Execute the clear status register command to set the program status flag to 0.

(2) Execute the read lock bit status command. Set the FMR02 bit to 1 if the lock bit

of the block where the error has occurred is set to 0. If the lock bit is set to 1

(unlocked), the address in which error has occurred cannot be used as it is.

Execute the block erase command to erase the block, in which error has

occurred, before executing the program command to program to the same

address again.

(3) Execute the program command again.

NOTE:

2. If an error still occurs, the address in error cannot be used.

[When lock bit program or protect bit program command is executed]

(1) Execute the clear status register command to set the program status flag to 0.

(2) Set the FMR02 bit to 1.

(3) Execute the block erase command to erase the block where the error has

occurred.

(4) Execute the lock bit program command or protect bit program command again

after programming data.

NOTE:

3. If an error still occurs, the block in error cannot be used.

NOTE:

4. When either the FMR06 or FMR07 bit is 1 (terminated by error), the program command, block erase command, lock bit program

command, read lock bit status command and protect bit program command cannot be accepted. Execute the clear status

Figure 23.15

Error Check and Handling Procedure for Each Error

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