M16C80 Datasheet, PDF (325/358 Pages) Renesas Technology Corp – RENESAS 16-BIT SINGLE-CHIP MICROCOMPUTER M16C FAMILY / M16C/80 SERIES

M16C/80 Group
32. Standard serial I/O mode
Page 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–D7) for the page (256 bytes) specified with addresses A8 to
A23 will be output sequentially from the smallest address first in sync with the rise of the clock.
RxD1
(M16C reception data)
TxD1
(M16C transmit data)
FF16
A8 to
A15
A16 to
A23
data0
data255
Figure 32.21 Timing for page read
Read Status Register Command
This command reads status information. When the “7016” command code is sent with the 1st byte, the
contents of the status register (SRD) specified with the 2nd byte and the contents of status register 1
(SRD1) specified with the 3rd byte are read.
RxD1
(M16C reception data)
TxD1
(M16C transmit data)
7016
SRD SRD1
output output
Figure 32.22 Timing for reading the status register
Clear Status Register Command
This command clears the bits (SR3–SR5) which are set when the status register operation ends in
error. When the “5016” command code is sent with the 1st byte, the aforementioned bits are cleared.
RxD1
(M16C reception data)
TxD1
(M16C transmit data)
5016
Figure 32.23 Timing for clearing the status register
Rev.1.00 Aug. 02, 2005 ^{Page 314} of 329
REJ09B0187-0100