7641_06 Datasheet, PDF (115/385 Pages) Renesas Technology Corp – 8-BIT SINGLE-CHIP MICROCOMPUTER

7641 Group
HARDWARE
FLASH MEMORY MODE
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.
SCLK
SRXD
STXD
SRDY (BUSY)
FF16
AB8 to AB16 to
AB15 AB23
data0
Fig. 89 Timing for page read
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
register 1 (SRD1) with the 3rd byte are read.
data255
SCLK
SRXD
STXD
SRDY (BUSY)
Fig. 90 Timing for reading status register
7016
SRD SRD1
output output
Rev.2.00 Aug 28, 2006 page 98 of 113
REJ09B0336-0200