M16C26 Datasheet, PDF (228/239 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
Software Commands
Table 1.23.2 lists software commands. In the standard serial I/O mode 2, erase operations, programs
and reading are controlled by transferring software commands via the RxD1 pin. Standard serial I/O
mode 2 adds four transmission speed commands - 9,600, 19,200, 38,400 and 57,600 bps - to the soft-
ware commands of standard serial I/O mode 1. Software commands are explained here below.
Table 1.23.2. Software commands (Standard serial I/O mode 2) (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)
10 Read check data (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}
FD16 ^Check
data
(low)
Check
data
(high)
Not
acceptable
11 Baud rate 9600 (Note 2)
12 _{Baud rate 19200 (Note 2)}
13 _{Baud rate 38400 (Note 2)}
14 Baud rate 57600 (Note 2)
B016
B016
B116
B116
B216
B216
B316
B316
Acceptable
Acceptable
Acceptable
Acceptable
Note 1: All commands can be accepted when the flash memory is totally blank.
Note 2: Shading 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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