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AMD Am79C930 User Manual

Page 96

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AMD

P R E L I M I N A R Y

96

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

7

RXCD

pin

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.

6

USER6D

pin

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.

5

USER5D

pin

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.

4

LLOCKE

pin

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.

3

RCEN

0

Register Control Enable. Used to control the functional timing of
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.

2

TXMOD

0

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.

1

TXPE

0

TXPE

pin control. The TXPE bit affects the value of the

TXPE

pin as

described in the

Multi-Function Pin section.

0

TXCMD

0

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.