AM79C930 datasheet(103/161 Pages) AMD

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103

Am79C930

TIR28: RSSI Lower Limit

This register is the RSSI Lower Limit register. The value

in this register is compared against converted RSSI in-

put values. When the converted RSSI value is equal to

or exceeds the value in this register, then an indication

will be sent to the clear channel assessment logic.

Bit

Name

Reset Value

Description

RSALT

RSSI Equal or Above Limit. When the converted RSSI input value

equals or exceeds the value in the RSSI lower limit register, then

the Am79C930 device will set this bit to a 1. When the converted

RSSI input value is less than the value in the RSSI lower limit regis-

ter, then the Am79C930 device will set this bit to a 0.

6–0

RLLT[6:0]

00h

RSSI Lower Limit. The value in this register is compared against

converted RSSI input values. When the converted RSSI value

equals or exceeds the value in this register, then an indication will

be sent to the clear channel assessment logic.

TIR29: USER Pin Data

This register is the USER Pin Data register. This register

allows access to the USER[4:0] pins.

Bit

Name

Reset Value

Description

USER7DL

USER7 pin Data. The value that is written to this bit will be inverted

and then driven out to the USER7 pin of the Am79C930 device

when the system interface mode is PCMCIA and the USER7EN bit

of TCR14 is set to ONE. In all other cases, the value of USR7DL will

have no effect on the value of the USER7 pin. The value that is read

from this bit represents the inverted value of the USER7 pin of the

Am79C930 device at any time in any mode.

The complete control of the function of the USER7/IRQ11 pin is de-

scribed in the

Multi-Function Pin section.

Reserved

–

Reserved. Must be written as a 0. Reads of this bit produce

undefined data.

Reserved

–

Reserved. Must be written as a 0. Reads of this bit produce

undefined data.

4–0

USERDT[4:0]

USER Pin Data[4:0]. The value that is written to any bit of this regis-

ter will be driven out to the corresponding USER pin of the

Am79C930 device when the corresponding USEREN bit of TCR14

has been set to a 1 and the PCMCIA pin is set to 1. The value that is

read from any bit of this register represents the current value of the

corresponding USER pin of the Am79C930 device regardless of

USEREN bit or PCMCIA pin settings.

The complete control of the function of each of the USER pins is de-

scribed in the

Multi-Function Pin section.

TIR30: Test Dummy Register

This register is the TEST dummy register.

Bit

Name

Reset Value

Description

7–0

Reserved

–

Reserved. Must be written as a 0. Reads of this bit produce

undefined data.

AM79C930 Datasheet(PDF) 103 Page - Advanced Micro Devices

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