M16C26 Datasheet, PDF (214/239 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 1 (Flash Memory Version)
M16C/26 Group
SINGLE-CHIP 16-BIT CMOS MICROCOMPUTER
Software Commands
Table 1.22.2 lists the software commands, and their descriptions, in standard serial I/O mode 1. Erase
operations, programming, reading status, etc. are controlled by transferring software commands via the
RxD1 pin.
Table 1.22.2. Software commands (Standard serial I/O mode 1) (Note 1)
Control Command
1 Page read (Note 2)
1st Byte 2nd
Transfer Byte
FF16 ^Address
(middle)
3rd
Byte
Address
(high)
4th
Byte
Data
output
5th
Byte
Data
output
6th
Byte
Data
output
... nth When ID is
Byte not verified
Data
Not
output to acceptable
259th byte
2 Page program
4116 Address Address Data
Data
Data Data
Not
(middle) (high) input input
input input to acceptable
259th byte
3 Block erase
2016 Address Address D016
(middle) (high)
Not
acceptable
4 Erase all code blocks (Note 4) _{A716 D016}
5 _{Read status register (Notes 2,3) 7016}
6 _{Clear status register}
5016
SRD
output
SRD1
output
Not
acceptable
Acceptable
Not
acceptable
7 ID check function
F516 ^{Address Address Address ID size}
ID1
(low) (middle) (high)
To ID7 ^Acceptable
8 Download function
9 Version data output function
(Note 2)
FA16
Size
Size Checksum Data To required
(low)
(high)
input ^{no. of times}
Not
acceptable
FB16 Version Version Version _{Version Version} Version Acceptable
data
data
data
data
data ^{data output}
output output output output output ^{to 9th byte}
10 Read check data (Note 2)
FD16 Check
data
(low)
Check
data
(high)
Not
acceptable
Note 1: All commands can be accepted when the flash memory is totally blank.
Note 2: Shaded area indicates transfer from flash memory microcomputer to peripheral unit. All other data is
transferred from the peripheral unit to the flash memory microcomputer.
Note 3: SRD refers to status register data. SRD1 refers to status register 1 data.
Note 4: The 'erase all' command does not erase the Flash data blocks.
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Renesas Technology Corp.