DP8344 datasheet(170/184 Pages) NSC

170 / 184 page

60 Reference Section (Continued)

RTR

RECEIVETRANSMIT REGISTER

Alternate R4 readwrite

76543210

RTF7 RTF6 RTF5 RTF4 RTF3 RTF2 RTF1 RTF0

RTF7 – 0

Receive Transmit FIFO’s

Inputoutput

port to the least significant eight bits of receive

and transmit FIFO’s

OWP

TF10 – 8 and

RTF7 – 0 are pushed onto the transmit FIFO

on moves into RTR

RF10 – 8 and RTF7 –

0 are popped from receiver FIFO on moves

out of RTR

Further information Section 30

Transceiver

TCR

TRANSCEIVER COMMAND REGISTER

Alternate R6 readwrite

RLQ

SEC

SLR

ATA

OWP

TF10

TF9

TF8

RLQ

Receive Line Quiesce

Selects number of

line quiesce bits the receiver looks for

RLQ

Number of

Quiesces

SEC

Select Error Codes

When high ECR is

switched into RTR location

SLR

Select Line Receiver

Selects the receiver

input source

SLR

Source

DATA-IN

On-chip analog

line receiver

ATA

Advance Transmitter Active

When high

TX-ACT is advanced one half bit time so that

the transmitter can generate 55 line quiesce

pulses

OWP

Odd Word Parity

Controls transmitter

word parity

OWP

Word Parity

Even

Odd

TF10 – 8

Transmit FIFO

OWP

TF10 – 8

and

RTF7 – 0 are pushed onto transmit FIFO on

moves into RTR

Further information Section 30 Transceiver

170

DP8344 Datasheet(PDF) 170 Page - National Semiconductor (TI)

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