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M38C88EC-FP

SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER

MITSUBISHI ELECTRIC  

PRELIMINARY NSocothimcaene:gpTeah.riasmisetnrioct laimfiintsalasrepescuibfijceacttioton.

XCIN

XCOUT

MITSUBISHI MICROCOMPUTERS

38C8 Group

SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER

Timer 1 count

Timer 2 count

XIN

XOUT Internal system clock selection bit

source selection

source selection

(Note)

bit

bit

Low-speed mode

“1”

“1”

1/2

“0”

Middle-/High-speed mode

1/4

1/2

“0”

Timer 1

“0”

“1”

Timer 2

Main clock stop bit

Main clock division ratio selection bit

Middle-speed mode

“1”

“0”

High-speed mode

or Low-speed mode

Timing φ

(Internal clock)

QS

R

STP instruction

SQ

WIT

R

instruction

QS

R STP instruction

Reset

Interrupt disable flag I

Interrupt request

Note: When selecting the XC oscillation, set the port XC switch bit to “1” .

Fig. 38 Clock generating circuit block diagram

38

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