M38503MXH Datasheet, PDF (58/86 Pages) Mitsubishi Electric Semiconductor – SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER

MITSUBISHI MICROCOMPUTERS
3850 Group (Spec. H)
SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER
Software Commands
Table 17 lists software commands. In the standard serial I/O mode,
erase operations, programs and reading are controlled by transfer-
ring software commands via the RxD pin. Software commands are
explained here below. Basically, the software commands of the
standard serial I/O mode is as same as that of the parallel I/O mode,
but it is excluded 1 command of block erase, and it is added 3 com-
mand of ID check, download function, version data output function.
Table 17 Software commands (Standard serial I/O mode 1)
Control command
1 Page read
1st byte
transfer
FF₁₆
2nd byte
Address
(middle)
3rd byte
Address
(high)
4th byte 5th byte 6th byte
Data
output
Data
output
Data
Data
output output to
259th byte
When ID is
not verified
Not
acceptable
2 Page program
4116
Address
(middle)
Address
(high)
Data
input
Data
input
Data
input
Data input
Not
to 259th acceptable
byte
3 Erase all blocks
A716 D016
4 Read status register
7016
SRD
output
SRD1
output
5 Clear status register
5016
6 ID check
F516
Address
(low)
Address Address
(middle) (high) ^{ID size}
ID1
To ID7
7 Download function
Size
FA16 ^{Size (low) (high)}
Check-
sum
To
Data required
input number
of times
8
Version data output function ^FB16
Version
data
Version Version Version Version Version
data
data
data data
data
output output output output output ^{output to}
9th byte
Not
acceptable
Acceptable
Not
acceptable
Acceptable
Not
acceptable
Acceptable
Notes 1: Shading indicates transfer from flash memory microcomputer to peripheral unit. All other data is transferred from the peripheral
unit to the flash memory microcomputer.
2: SRD refers to status register data. SRD1 refers to status register 1 data.
3: All commands can be accepted when the flash memory is totally blank.
4: Address high (A16 to A23) must be “0016”.
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