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M30201

SINGLE-CHIP 16-BIT CMOS MICROCOMPUTER

Mitsumi 

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Mitsubishi microcomputers

M30201 Group

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 almost the same effect as a hardware reset. The contents of internal

RAM are preserved.

Figure 1.14 shows the processor mode register 0 and 1.

Processor mode register 0 (Note)

b7 b6 b5 b4 b3 b2 b1 b0

0 00 0

Symbol

PM0

Address

000416

When reset

XXXX00002

Bit symbol

Bit name

Function

RW

Reserved bit

Must always be set to “0”

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.

When write, set "0". When read, their contents are indeterminate.

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

00XXXXX02

Bit symbol

Reserved bit

Bit name

Function

Must always be set to “0”

Nothing is assigned.

When write, set "0". When read, their contents are indeterminate.

RW

PM17

Wait bit

0 : No wait state

1 : Wait state inserted

Note: Set bit 1 of the protect register (address 000A16) to “1” when writing new values

to this register.

Figure 1.14. Processor mode register 0 and 1.

16

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