M16CSLASH62P datasheet(66/349 Pages) MITSUBISHI

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Clock Generation Circuit

Mitsubishi microcomputers

M16C / 62P Group

SINGLE-CHIP 16-BIT CMOS MICROCOMPUTER

Under

development

Preliminary Specifications Rev.1.0

Specifications in this manual are tentative and subject to change.

Table 1.9.4. Pin Status During Wait Mode

Memory expansion mode

Single-chip mode

Microprocessor mode

_______

A0 to A19, D0 to D15, CS0 to CS3,

Retains status before wait mode

________

BHE

_____

______

________

_________

RD, WR, WRL, WRH

“H”

__________

HLDA,BCLK

“H”

ALE

“H”

I/O ports

Retains status before wait mode

CLKOUT

When fC selected

Does not stop

When f8, f32 selected

Does not stop when the CM02

bit is “0”.

When the CM02 bit is “1”, the

status immediately prior to

entering wait mode is main-

tained.

Interrupt

CM02=0

CM02=1

NMI interrupt

Can be used

Serial I/O interrupt

Can be used when operating

with internal or external clock

Can be used when operating

with external clock

key input interrupt

Can be used

A-D conversion

interrupt

Can be used in one-shot mode

or single sweep mode

Timer A interrupt

Can be used in all modes

Can be used in event counter

mode or when the count

source is fC32

Timer B interrupt

INT interrupt

Can be used

(Do not use)

Can be used

Table 1.9.5. Interrupts to Exit Wait Mode

mode. If CM02 bit is “1” (peripheral function clocks turned off during wait mode), the peripheral func-

tions using the peripheral function clocks stop operating, so that only the peripheral functions clocked

by external signals can be used to exit wait mode.

Table 1.9.5 lists the interrupts to exit wait mode.

If the microcomputer is to be moved out of wait mode by a peripheral function interrupt, set up the

following before executing the WAIT instruction.

1. In the ILVL2 to ILVL0 bits of interrupt control register, set the interrupt priority level of the periph

eral function interrupt to be used to exit wait mode.

Also, for all of the peripheral function interrupts not used to exit wait mode, set the ILVL2 to ILVL0

bits to “0002” (interrupt disable).

2. Set the I flag to “1”.

3. Enable the peripheral function whose interrupt is to be used to exit wait mode.

In this case, when an interrupt request is generated and the CPU clock is thereby turned on, an

interrupt routine is executed.

The CPU clock turned on when exiting wait mode by a peripheral function interrupt is the same CPU

clock that was on when the WAIT instruction was executed.

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