M30222 Datasheet, PDF (19/237 Pages) Mitsubishi Electric Semiconductor – SINGLE-CHIP 16-BIT CMOS MICROCOMPUTER

M30222 Group ^{deUvnedloeprment}
MITSUBISHI MICROCOMPUTERS
Specifications in this manual are tentative and subject to change
Rev. G
Software Reset
SINGLE-CHIP 16-BIT CMOS MICROCOMPUTER
Software Reset
Writing “1” to bit 3 of the processor mode register 0 (address 000416) applies a (software) reset to the
microcomputer. A software reset has the same effect as a hardware reset. The contents of internal RAM
are preserved.
Figure 1.10 shows processor mode register 0 and 1.
Processor mode register 0 (Note)
b7 b6 b5 b4 b3 b2 b1 b0
00
0
Symbol
PM0
Address
000416
When reset
0016
Bit symbol
Bit name
Function
RW
Nothing is assigned.
Write "0" when writing to this these bits. If read, the value is indeterminate.
PM03
Software reset bit
The device is reset when this bit is set
to “1”. The value of this bit is “0” when
read.
Nothing is assigned.
Write "0" when writing to this these bits. If read, the value is indeterminate.
Reserved bit
Must always be set to "0"
Note : Set bit 1 of the protect register (address 000A16) to “1” when writing new
values to this register.
Processor mode register 1 (Note)
b7 b6 b5 b4 b3 b2 b1 b0
0
00
Symbol
PM1
Address
000516
When reset
0XXXXX002
Bit symbol
Bit name
Function
RW
Reserved bit
Must always be set to “0”
Nothing is assigned.
Write "0" when writing to this these bits. If read, the value is indeterminate.
PM17
Wait bit
0 : No wait state
1 : Wait state inserted
OO
Note : Set bit 1 of the protect register (address 000A16 ) to “1” when writing new values
to this register.
Fig. 1.10. Processor mode register 0 and 1
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