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AC208-DS03-R 数据表(PDF) 38 Page - Broadcom Corporation.

部件名 AC208-DS03-R
功能描述  2.5V 10/100-TX 8-Port Repeater/71 Uplink Port with Integrated Bridge
PDF  58 Pages
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制造商  BOARDCOM [Broadcom Corporation.]
网页  http://www.broadcom.com
标志 BOARDCOM - Broadcom Corporation.

AC208-DS03-R 数据表(HTML) 38 Page - Broadcom Corporation.

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AC208
Preliminary Data Sheet
07/08/02
B roa dcom
Page 30 PHY Registers
Document
AC208-DS04-405-R
DIAGNOSTIC REGISTER
CABLE LENGTH REGISTER
Table 29: Diagnostic Register
Register
Bit
Name
Description
Mode
Default
18.15
Lp_lpbk
Link pulse loopback.
1 = loopback the link pulse for auto-negotiation testing
RW
0
18.14
Send_nlp
1 = force link pulse generator to send nlp event in auto-negotiation
mode.
RW
0
18.13
Force link
pass bt
1 = force 10BASE-T link pass
RW
0
18.12
Force link
pass tx
1 = force 100 TX link pass
RW
0
18.11
DPLX
This bit indicates the result of the Auto-Neg for duplex arbitration.
RO
0
18.10
Speed
This bit indicates the result of the Auto-Neg for data speed arbitration.
RO
X
18.9
RX_PASS
In 10BASE-T mode, this bit indicates that Manchester data has been
detected.
In 100BASE-T mode, it indicates valid signal has been received but
not necessarily locked on to.
RC
X
18.8
RX_LOCK
Indicates the receive PLL has locked onto the received signal for the
selected speed of operation (10BASE-T or 100BASE-TX). This bit is
set whenever a cycle-slip occurs, and will remain set until it is read.
RC
X
18.[7:4]
ARB_STATE
HIGHEST
Highest state of Auto-Negotiation state machine since reset on last
read operation.
RC
TBD
18.[3:0]
ARB_STATE
LOWEST
Lowest state of Auto-Negotiation state machine since reset on last
read operation.
RC
TBD
Table 30: Cable Length Register
Register
Bit
Name
Description
Mode
Default
20.[15:9]
Reserved
RO
0000000
20.8
Adaptation
disable
1 = Disable adaptation
RW
0
20.[7:4]
Cable
Length
Indication
These bits indicate cable length from 0 to 150m. Each bit represents
10m. For example, if the cable length is 100m then bits [7:4] = 1010.
These bits are only applicable to 100TX mode.
RW
XXXX
20.[3:0]
Adaptation
Low limit
Adaptation setting, when SD signal is first detected.
RO
XXXX



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