Renesas PCA4738F-80A Uživatelský manuál stáhnout pdf (Strana 39)

SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER

MITSUBISHI MICROCOMPUTERS

38C3 Group

WIT

instruction

STP instruction

Timing φ

(Internal system clock)

STP instruction

Main clock stop bit

Timer 2

Timer 1

1/2

1/4

XIN

XOUT

Interrupt request

Reset

Port XC switch bit

“1” “0”

Timer 1 count

source selection

bit

Timer 2 count

source selection

bit

Low-speed mode

Middle-/High-speed mode

Internal system clock selection bit

(Note)

Middle-speed mode

High-speed mode

or Low-speed mode

Note : When using the low-speed mode, set the port X

C switch bit to “1” .

Main clock division ratio selection bit

“1”

“0”

“1”

“0”

“1”

“0”

Interrupt disable flag I

1/2

COUT

XCIN

“1”

“0”

Fig. 42 Clock generating circuit block diagram

1 2 ... 34 35 36 37 38 39 40 41 42 43 44 ... 63 64

Renesas Technology Corp 1
Customer Support Dept 1
April 1, 2003 1
To all our customers 1
38C3 Group 10
RDY output selection bit 25
16 contents 37
1.0 First Edition 980602 63
Revision Description 63
Rev. Rev 63
No. date 63

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