5228-DS09-405-R datasheet(72/100 Pages) BOARDCOM

72 / 100 page

BCM5228

Data Sheet

7/12/04

Broa d c om Co rp o r a t i o n

Page 60

Auxiliary Mode Register

Document

5228-DS09-405-R

AUXILIARY MODE REGISTER

Activity LED Force Inactive. When set to 1, disables the Col LED, Transmit LED, Receive LED, and Activity LED. This bit

has a lower priority than the Activity LED Force On, bit 5 of register 1Bh.

Link LED Disable. When set to 1, disables the Link LED output pin. When 0, Link LED output is enabled.

Block TXEN Mode. When this mode is enabled, short IPGs of 1, 2, 3, or 4 TXC cycles all result in the insertion of two idles

before the beginning of the next packet’s JK symbols.

Table 37: Auxiliary Mode Register (Address 29d, 1Dh)

Bit

Name

R/W

Description

Default

15:5

Reserveda

a. Preserve existing values of reserved bits by completing a Read/Modify Write.

–

–000h

Activity LED Force Inactive

R/W

1 = Disable Col LED, Transmit LED,

Receive

LED, and Activity LED

0 = Enable above LEDs

Link LED Disable

R/W

1 = Disable link LED output

0 = Enable link LED output

Reserveda

–

–0

1Block TXEN Mode

R/W

1 = Enable block TXEN mode

0 = Disable block TXEN mode

Reserveda

–

–0

Note: R/W = Read/Write, RO = Read Only, SC = Self Clear, LL = Latched Low, LH = Latched High, LL and LH Clear

after read operation.

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