Z85C3016PSG Просмотр технического описания (PDF) - Zilog

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производитель

Z85C3016PSG

CMOS SCC Serial Communications Controller

Zilog 

CMOS SCC Serial Communications Controller

Product Specification

8

TxDA, TxDB

Transmit Data (outputs, active High) . These output signals transmit serial data at stan-

dard TTL levels.

TRxCA, TRxCB

Transmit/Receive Clocks (inputs or outputs, active Low) . These pins can be 

programmed in several different operating modes. TRxC may supply the receive clock or

the transmit clock in the input mode or supply the output of the Digital Phase-locked loop,

the crystal oscillator, the Baud Rate Generator, or the transmit clock in the output mode.

W/REQA, W/REQB

Wait/Request (outputs, open-drain when programmed for a Wait function, driven

High or low when programmed for a Request function) . These dual-purpose outputs

can be programmed as Request lines for a DMA controller or as Wait lines to synchronize

the CPU to the SCC data rate. The reset state is Wait.

Z85C30

The following links refer to descriptions of the pin functions specific to the Z85C30

device.

• A/B

• CE

• D7–D0

• D/C

• RD

• WR

A/B

Channel A/Channel B (input) . This signal selects the channel in which the Read or

Write operation occurs.

PS011706-0511

Pin Descriptions

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