M30622ECTFP datasheet(45/184 Pages) MITSUBISHI

45 / 184 page

Tentative Specifications REV.A

Mitsubishi microcomputers

M16C / 62T Group

SINGLE-CHIP 16-BIT CMOS MICROCOMPUTER

Specifications in this manual are tentative and subject to change.

Under

development

Wait Mode

When a WAIT instruction is executed, the BCLK stops and the microcomputer enters the wait mode. In this

mode, oscillation continues but the BCLK and watchdog timer stop. Writing “1” to the WAIT peripheral

function clock stop bit and executing a WAIT instruction stops the clock being supplied to the internal

peripheral functions, allowing power dissipation to be reduced. Table 1.13.3 shows the status of the ports in

wait mode.

Wait mode is cancelled by a hardware reset or interrupt. If an interrupt is used to cancel wait mode, the

microcomputer restarts using as BCLK, the clock that had been selected when the WAIT instruction was

executed.

Wait Mode

Table 1.13.3. Port status during wait mode

Memory expansion mode

Single-chip mode

Microprocessor mode

_______

Address bus, data bus, CS0 to CS3

Retains status before wait mode

_____

______

________

_________

RD, WR, BHE, WRL, WRH

“H”

__________

HLDA,BCLK

“H”

ALE

“H”

Port

Retains status before wait mode

CLKOUT

When fC selected

Valid only in single-chip mode

Does not stop

When f8, f32 selected

Valid only in single-chip mode

Does not stop when the WAIT

peripheral function clock stop

bit is “0”.

When the WAIT peripheral

function clock stop bit is “1”, the

status immediately prior to en-

tering wait mode is main-

tained.

Note 1:

______

In M30623(80-pin package), CS0 to CS3 have no corresponding external pin, but are internally the

above conditions.

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