38B7 datasheet(73/110 Pages) RENESAS

73 / 110 page

38B7 Group

SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER

MITSUBISHI MICROCOMPUTERS

WIT instruction

STP instruction

Timing

φ (internal clock)

STP instruction

Main clock stop bit

(Note 3)

1/4

XIN

XOUT

XCOUT

XCIN

Interrupt request

Reset

Interrupt disable flag l

1/2

Port XC

switch bit (Note 3)

“1”

“0”

“1”

Timer 1 count source

selection bit (Note 2)

Low-speed mode

High-speed or

middle-speed

mode

Middle-speed mode

High-speed or

low-speed mode

Internal system clock

selection bit (Notes 1, 3)

“1”

“0”

Timer 1

Timer 2

Timer 2 count source

selection bit (Note 2)

“0”

Main clock division ratio

selection bits (Note 3)

“1

”

“0

”

“1”

“0”

Notes 1: When low-speed mode is selected, set the port Xc switch bit (b4) to “1”.

2: Refer to the structure of the timer 12 mode register.

3: Refer to the structure of the CPU mode register.

Fig. 81 Clock generating circuit block diagram

38B7 Datasheet(PDF) 73 Page - Renesas Technology Corp

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