Z80 datasheet(262/330 Pages) ZILOG

262 / 330 page

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7UGT /CPWCN

UM008101-0601

Serial Input/Output

242

Table6.BisyncTransmit Mode

Function

Typical Program Steps

Comments

Initialize WR0

Channel Reset, Reset Transmit CRC

Generator

Reset SIO, Initialize CRC Generator

WR0

Pointer 2

WR2

Interrupt Vector

Channel B only

WR0

Pointer 3

WR3

Auto Enables

Transmission begins only after CTS

is detected

WR0

Pointer 4

WR4

Parity Information, Sync Modes

Information, X1Clock Mode

Issue transmit parameters

WR0

Pointer 6

WR6

Sync Character 1

WR0

Pointer 7, Reset External/Status Interrupts

WR7

Sync Character 2

WR0

Pointer 1, Reset External/Status Interrupts

WR1

Status Affects Vector, External Interrupt

Enable, Transmit Interrupt Enable or

WAIT/READY Mode Enable

External Interrupt Mode monitors

the status of CTS and DCD input

pins as well as the status of Tx

Underrun/EOM Latch. Transmit

Interrupt Enable interrupts when the

transmit buffer becomes empty; the

WAIT/READY Mode canbe usedto

transfer data using DMA or CPU

block transfer.

Z80 Datasheet(PDF) 262 Page - Zilog, Inc.

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