AMD Am79C930 User Manual
Page 112
AMD
P R E L I M I N A R Y
112
Am79C930
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