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AL2100-DS00-R 数据表(PDF) 32 Page - Broadcom Corporation.

部件名 AL2100-DS00-R
功能描述  Ultra Low-Power 100 Mbps Ethernet Media Converter
PDF  52 Pages
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制造商  BOARDCOM [Broadcom Corporation.]
网页  http://www.broadcom.com
标志 BOARDCOM - Broadcom Corporation.

AL2100-DS00-R 数据表(HTML) 32 Page - Broadcom Corporation.

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AL2100
Preliminary Data Sheet
11/11/02
Broa d c om Co rp o r a ti o n
Page 24
100base-Tx PHY Registers
Document
AL2100-DS01-405-R
100BASE-FX PHY REGISTERS
CONTROL REGISTER
Table 21: 100Base-FX PHY Registers
Register
Name
Address
0
Control Register
2100
1
Status Register
7849
2
PHY Identifier 1 Register
0022
3
PHY Identifier 2 Register
5523
4-20
Reserved
XXXX
21
Receive Error Counter Register
0000
22-31
Reserved
XXXX
Table 22: Register 0: Control Register Bit Description
Bit
Name
Description
Mode
Default
15
Reset
1 = PHY reset.
This bit is self-clearing.
RW/SC
0
14
Loopback
1 = Enable loopback mode. This loops back TXD to RXD, and
ignores all the activity on the cable media.
0 = Normal operation.
RW
0
13
Speed Select
1 = 100Mbps.
Default is always = 1. This bit set to 0 is undefined.
RW
1
12
ANEN Enable
1= N/A
0= Disable auto-negotiation. This bit is always set to 0 in FX
PHY.
RW
0
11
Power Down
1 = Power down. All blocks except for SMI are turned off. Setting
the PWRDN pin to high achieves the same result.
0 = Normal operation.
RW
0
10
Isolate
1 = Electrically isolate the PHY from MII. PHY is still able to
response to SMI.
0 = Normal operation.
RW
0
9Restart
ANEN
1 = Restart auto-negotiation process.
0 = Normal operation.
RW/SC
0
8
Duplex Mode
1 = Full duplex.
0 = Half duplex.
RW
set by DUPLEX
pin
7
Collision Test
1 = Enable collision test, which issues the COL signal in
response to the assertion of the TX_EN signal. Collision test
is disabled when PCSBP pin is high. Collision test is enabled
regardless of the duplex mode.
0 = Disable COL test.
RW
0
6:0
Reserved
RW
0000000



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