7643 datasheet(107/424 Pages) RENESAS

107 / 424 page

Rev.2.00

Aug 28, 2006

page 90 of 103

REJ09B0133-0200

OVERVIEW

FLASH MEMORY MODE

7643 Group

qBlock Erase Command

This command erases the contents of the specifided block. Ex-

ecute the block erase command as explained here following.

(1) Transfer the “2016” command code with the 1st byte.

(2) Transfer addresses AB8 to AB15 and AB16 to AB23 with the 2nd

and 3rd bytes respectively.

(3) Transfer the verify command code “D016” with the 4th byte.

With the verify command code, the erase operation will start

for the specifided block in the flash memory. Set the addresses

AB8 to AB23 to the maximum address of the specified block.

2016

D016

SCLK

SRXD

STXD

SRDY(BUSY)

AB8 to

AB15

AB16 to

AB23

When block erasing ends, the SRDY (BUSY) signal changes from

“H” to “L” level. The result of the erase operation can be known by

reading the status register.

For more information, see the section on the status register.

Fig. 85 Timing for block erasing

qErase All Blocks Command

This command erases the contents of all blocks. Execute the

erase all blocks command as explained here following.

(1) Transfer the “A716” command code with the 1st byte.

(2) Transfer the verify command code “D016” with the 2nd byte.

With the verify command code, the erase operation will start

and continue for all blocks in the flash memory.

When erase all blocks end, the SRDY (BUSY) signal changes

from “H” to “L” level. The result of the erase operation can be

known by reading the status register.

A716

D016

SCLK

SRXD

STXD

SRDY (BUSY)

Fig. 86 Timing for erase all blocks

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