AM79C930VCW datasheet(112/161 Pages) AMD

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Am79C930

TCR13: Pin Configuration A

This register is the Pin Configuration A register. This

or as high impedance inputs.

CONFIGURATION REGISTER INDEX:

0Dh

Bit

Name

Reset Value

Description

LNKEN

Link LED Enable. LNKEN can be used to control the function of the

LNK LED output. The control of the function of the LNK pin is de-

scribed in the

Multi-Function Pin section.

LFPEEN

LFPE Enable. LFPEEN is used to determine the function of the

LFPE pin. The control of the function of the LFPE pin is described in

the

Multi-Function Pin section.

HFPEEN

HFPE Enable. HFPEEN is used to determine the function of the

HFPE pin. The control of the function of the

HFPE pin is described

in the

Multi-Function Pin section.

SDCLKEN

SDCLK Enable. SDCLKEN is used to determine the function of the

SDCLK pin. The control of the function of the SDCLK pin is de-

scribed in the

Multi-Function Pin section.

SDS3LEN

SDSEL3 Enable. SDS3LEN is used to determine the function of the

SDSEL3 pin. The control of the function of the SDSEL[3] pin is de-

scribed in the

Multi-Function Pin section.

SDS2LEN

SDSEL2 Enable. SDS2LEN is used to determine the function of the

SDSEL2 pin. The control of the function of the SDSEL[2] pin is de-

scribed in the

Multi-Function Pin section.

SDS1LEN

SDSEL1 Enable. SDS1LEN is used to determine the function of the

SDSEL1 pin. The control of the function of the SDSEL[1] pin is de-

scribed in the

Multi-Function Pin section.

RXPELEN

RXPE Enable. RXPELEN is used to determine the function of the

RXPE pin. The control of the function of the RXPE pin is described

in the

Multi-Function Pin section.

TCR14: Pin Configuration B

This register is the Pin Configuration B register. This

outputs or as high impedance inputs.

CONFIGURATION REGISTER INDEX:

0Eh

Bit

Name

Reset Value

Description

USER7EN

USER7 Enable. USER7EN, the ISA PnP registers 70h and 71h,

and the PCMCIA pin setting are used to determine the function of

the USER7 pin. The USER7 pin can be programmed to function as

either an input or an output.

The control of the function of the USER7/IRQ11 pin is described in

the

Multi-Function Pin section.

LLOCKEN

LLOCKE Enable. LLOCKEN and the PCMCIA pin are used to de-

termine the direction of the LLOCKE/SA15 pin. When LLOCKEN is

set to a 1 and the PCMCIA pin is set to 1, then the LLOCKE/SA15

pin is enabled to drive both high and low output values. LLOCKE

output values are determined by the LLOCKE bit of TIR11. When

LLOCKEN is reset to a 0, then the LLOCKE pin is forced to a high-

impedance state. Reads of the LLOCKE bit of TIR11 will yield the

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