KS57C2308/P2308/C2316/P2316

 

 

 

OSCILLATOR CIRCUITS

 

 

 

 

 

 

Watch Timer

 

Main-System

fx

 

fxt

Sub-System

LCD Controller

 

Oscillator

 

Oscillator

 

 

 

 

 

 

 

Circuit

 

 

 

Circuit

 

 

 

Selector

Oscillator

 

 

XIN

XOUT

 

 

Stop

XTIN

XTOUT

 

 

 

 

 

fxx

 

 

 

 

 

Oscillator

1/8 - 1/4096

 

Basic Timer

 

 

 

 

 

Frequency

 

Timer/Counter

 

Stop

 

 

Dividing

 

Watch Timer

 

 

 

 

 

Circuit

 

LCD Controller

 

 

1/2

1/16

 

Clock Output Circuit

 

 

 

SIO

 

 

 

 

 

 

 

SCMOD.3

 

 

 

 

 

SCMOD.0

 

 

Selector

 

 

 

 

 

 

 

SCMOD.2

 

fx/1,2,16

fxt

 

 

 

 

 

 

 

 

 

 

Selector

 

 

 

 

 

 

1/4

 

PCON.0

 

 

 

 

CPU clock

 

 

 

 

CPU stop signal

 

 

 

 

 

 

 

 

PCON.1

 

 

 

(By IDLE or STOP instruction)

IDLE

PCON.2

 

 

 

Wait release signal

STO

 

 

Oscillator

Internal RESET

signal

PCON.3

 

Control

 

 

 

 

Circuit

 

Power down release

 

 

 

 

 

 

 

PCON.3, .2 clear

 

 

 

 

fx: Main-system clock

 

 

 

 

 

fxt: Sub-system clock

 

 

 

 

 

fxx: System clock

 

 

 

 

 

Figure 6-1. Clock Circuit Diagram

6-3

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Image 173
Samsung KS57C2308 manual Sto, Clock Circuit Diagram