M38B53M4-059FP datasheet(79/355 Pages) MITSUBISHI

Part #	M38B53M4-059FP

Description	8-BIT SINGLE-CHIP MICROCOMPUTER

PDF	355 Pages

Scroll/Zoom	100%

Manufacturer	MITSUBISHI [Mitsubishi Electric Semiconductor]

Direct Link	http://www.mitsubishichips.com

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79 / 355 page

38B5 Group User’s Manual

1-63

HARDWARE

FUNCTIONAL DESCRIPTION

Fig. 73 Clock generating circuit block diagram

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.

M38B53M4-059FP Datasheet(PDF) 79 Page - Mitsubishi Electric Semiconductor

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