38K2 Datasheet, PDF (115/151 Pages) Renesas Technology Corp – SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER

38K2 Group
The contents of software commands are explained as follows.
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 A8 to A15 and A16 to A23 with the 2nd and
3rd bytes respectively.
(3) From the 4th byte onward, data (D0 to D7) for the page (256
bytes) specified with addresses A8 to A23 will be output se-
quentially from the smallest address first synchronized with the
fall of the clock.
SCLK
RxD
TxD
SRDY (BUSY)
FF16
A8 to
A15
A16 to
A23
data0
Fig. 155 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
RxD
TxD
SRDY (BUSY)
Fig. 156 Timing for reading status register
7016
SRD SRD1
output output
Rev.3.00 Oct 15, 2006 page 115 of 147
REJ03B0193-0300