AM79C930 datasheet(96/161 Pages) AMD

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AMD

P R E L I M I N A R Y

Am79C930

TIR11: Transmit Sequence Control

This register is the Transmit Sequence Control. The

bits in this register determine the function of the transmit

sequence signals.

Bit

Name

Reset Value

Description

RXCD

RXC/IRQ10 pin Data. The value that is written to this bit will be

driven out to the RXC pin when the RXCEN bit of TCR15 has been

set to a 1 and the RXCFN bit of TCR28 has been set to a 0.

The value that is read from RXCD represents the current value of

the RXC/IRQ10 pin. The control of the function of the RXC/IRQ10

pin is described in the Multi-Function Pin section.

USER6D

USER6/IRQ5 pin Data. The value that is written to USER6D may be

driven out to the USER6/IRQ5 pin, depending upon the values of

the USER6EN bit (TCR15[3]), the USER6FN bit (TCR7[6]), the ISA

PnP registers 70h and 71h, and the operating mode of the

Am79C930 device.

The value read from USER6D will always represent the current

value of the USER6/IRQ5 pin. The control of the function of the

USER6/IRQ5 pin is described in the

Multi-Function Pin section.

USER5D

USER5/IRQ4 pin Data. The value that is written to USER5D may be

driven out to the USER5/IRQ4 pin, depending upon the values of

the USER5EN bit (TCR15[2]), the USER5FN bit (TCR7[5]), the ISA

PnP registers 70h and 71h, and the operating mode of the

Am79C930 device.

The value read from USER5D will always represent the current

value of the USER5/IRQ4 pin. The control of the function of the

USER5/IRQ4 pin is described in the

Multi-Function Pin section.

LLOCKE

LLOCKE pin data value. The value that is written to LLOCKE may

be driven out to the LLOCKE/SA15 pin, depending upon the values

of the LLOCKEN bit (TCR14[6]), and the operating mode of the

Am79C930 device (i.e., PCMCIA or ISA).

The value read from LLOCKE will always represent the current

value of the LLOCKE/SA15 pin. The control of the function of the

LLOCKE/SA15 pin is described in the

Multi-Function Pin section.

RCEN

the

TXCMD, TXMOD and TXPE pin values as defined in the

Multi-Function Pin section. See the Multi-Function Pin section de-

scription for each of these pins for more details.

TXMOD

TXMOD pin control. Used to control the functional timing of the

TXCMD, pin value as defined in the Multi-Function Pin section. See

the

Multi-Function Pin section description for more details.

TXPE

TXPE pin control. The TXPE bit affects the value of the TXPE pin as

described in the

Multi-Function Pin section.

TXCMD

TXCMD and

TXCMD pin control. The TXCMD bit affects the value

of the the TXCMD and

TXCMD pins as described in the Multi-Func-

tion Pin section.

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