7641 datasheet(115/385 Pages) RENESAS

115 / 385 page

Rev.2.00

Aug 28, 2006

page 98 of 113

7641 Group

REJ09B0336-0200

HARDWARE

FLASH MEMORY MODE

qRead Status Register Command

This command reads status information. When the “7016” com-

mand code is transferred with the 1st byte, the contents of the

status register (SRD) with the 2nd byte and the contents of status

qPage Read Command

This command reads the specified page (256 bytes) in the flash

memory sequentially one byte at a time. Execute the page read

command as explained here following.

(1) Transfer the “FF16” command code with the 1st byte.

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

and 3rd bytes respectively.

(3) From the 4th byte onward, data (DB0 to DB7) for the page (256

bytes) specified with addresses AB8 to AB23 will be output se-

quentially from the smallest address first synchronized with the

fall of the clock.

data0

data255

AB8 to

AB15

AB16 to

AB23

FF16

SCLK

SRXD

STXD

SRDY (BUSY)

SRD

output

SRD1

output

SCLK

SRXD

STXD

SRDY (BUSY)

7016

Fig. 89 Timing for page read

Fig. 90 Timing for reading status register

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