AL2100-DS00-R datasheet(35/52 Pages) BOARDCOM

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Preliminary Data Sheet

AL2100

11/11/02

Broa d c om Co rp o r a ti o n

Document

AL2100-DS01-405-R

Common Registers

Page 27

OPERATION MODE REGISTER

CRC FOR RECENT RECEIVED PACKET

COMMON REGISTERS

The following registers are mapped to Registers 28 through 31 on the TP PHY. Register 28[15:12] is used as a page select.

There are multiple pages of Registers 29 through 31, depending on the value of Register 28[15:12].

MODE CONTROL REGISTER

Table 28: Register 23: Operation Mode Register Bit Description

Bit

Name

Description

Mode

Default

15:14

Reserved

Clk_rclk_save

1 = Set rclk save mode. Rclk shuts off after 64 cycles of

each packet.

Reserved

Scramble disable

1 = Disable scrambler

Reserved

Pcsbp

1 = Enable PCS bypass mode.

23:8

Reserved

7:6

Reserved

4:0

Reserved

XXXXX

Table 29: Register 24: CRC for Recent Received Packet Bit Description

Bit

Name

Description

Mode

Default

15:0

CRC16

CRC16 value displayed. For system level test purposes.

0000H

Table 30: Common Register 0: Mode Control Register (Map to TP_PHY, Reg. 28) Bit Description

a.28.15:12

Page Selection

Select multiple common register pages.

0000

a.28.11:7

Reserved

0000

a.28.6

Reserved

a.28.5

Reserved

a.28.4

Reserved

a.28.3

Reserved

a.28.2

Act select

Act event select.

0 = Receive activity.

1 = TX or RX activity.

a.28.1

Reserved

a.28.0

Reserved

AL2100-DS00-R Datasheet(PDF) 35 Page - Broadcom Corporation.

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