Z80230 View Datasheet(PDF) - Zilog

Part Name

Description

Manufacturer

Z80230

Zilog SCC Serial Communication Controller

Zilog 

SCC™/ESCC™ User’s Manual

SCC/ESCC Ancillary Support Circuitry

External

3

Crystal

/SYNC Pin

B

R 16x

Output

TxC

G

/RTxC Pin

RxC

/TRxC Pin

SCC

Figure 3-11. Async Clock Setup Using an External Crystal

WR11

D7

D0

1 101 0110

WR14

D1

0

/TRxC OUT = BRG Output

/TRxC Pin = Output Pin

Tx Clock = BRG Output

Rx Clock = BRG Output

Using External Crystal

NRZ Data

SYNC

RxD Pin

TxC

Modem 1x

RxC

/RTxC Pin SCC

Figure 3-12. Clock Source Selection

BRG Clock Source = /RTXC

or XTAL OSCILLATOR

UM010901-0601

3-13

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