AMD

P R E L I M I N A R Y

 

 

TCR13: Pin Configuration A

This register is the Pin Configuration A register. This register is used to set the state of various pins as outputs or as high impedance inputs.

CONFIGURATION REGISTER INDEX:

0Dh

Bit

Name

Reset Value

Description

 

 

 

 

 

7

LNKEN

1

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.

6

LFPEEN

1

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.

5

HFPEEN

1

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.

4

SDCLKEN

1

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.

3

SDS3LEN

1

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.

2

SDS2LEN

1

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.

1

SDS1LEN

1

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.

0

RXPELEN

1

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 register is used to set the state of the USER[4:0] pins as outputs or as high impedance inputs.

CONFIGURATION REGISTER INDEX:

0Eh

Bit

Name

Reset Value

Description

 

 

 

 

 

7

USER7EN

0

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.

6

LLOCKEN

0

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

 

 

 

 

 

112

 

 

Am79C930

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Image 112
AMD Am79C930 manual TCR13 Pin Configuration a, 0Dh, TCR14 Pin Configuration B, 0Eh