M30201 datasheet(30/415 Pages) RENESAS

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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.

Figure 1.14. Processor mode register 0 and 1.

Processor mode register 0 (Note)

Symbol

Address

When reset

PM0

000416

XXXX00002

Bit name

Function

Bit symbol

b7 b6

b1 b0

PM03

Reserved bit

Software reset bit

The device is reset when this bit

is set to “1”. The value of this bit

is “0” when read.

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

values to this register.

Processor mode register 1 (Note)

Symbol

Address

When reset

PM1

000516

0XXXXXX02

Bit name

Function

Bit symbol

b6 b5

Nothing is assigned.

In an attempt to write to these bits, write “0”. The value, if read, turns

out to be 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.

Must always be set to “0”

Nothing is assigned.

In an attempt to write to these bits, write “0”. The value, if read, turns

out to be indeterminate.

Reserved bit

Must always be set to “0”

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