M16C26 Datasheet, PDF (229/239 Pages) Renesas Technology Corp – 16-BIT CMOS SINGLE-CHIP MICROCOMPUTER M16C FAMILY / M16C/20 SERIES

Udenvdeelropment
Preliminary Specifications Rev. 0.9
Specifications in this manual are tentative and subject to change.
Appendix Standard Serial I/O Mode 2 (Flash Memory Version)
M16C/26 Group
SINGLE-CHIP 16-BIT CMOS MICROCOMPUTER
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.
RxD1
(M16C reception data)
TxD1
(M16C transmit data)
FF16
A8 to
A15
A16 to
A23
data0
data255
Figure 1.23.2. 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 1.23.3. Timing for reading the status register
Renesas Technology Corp.
223