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5222-DS02-R 数据表(PDF) 44 Page - Broadcom Corporation.

部件名 5222-DS02-R
功能描述  Dual Port 10/100BASE-TX IEEE 802.3u Fast Ethernet Transceiver
PDF  76 Pages
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制造商  BOARDCOM [Broadcom Corporation.]
网页  http://www.broadcom.com
标志 BOARDCOM - Broadcom Corporation.

5222-DS02-R 数据表(HTML) 44 Page - Broadcom Corporation.

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BCM5222
Preliminary Data Sheet
7/20/04
Broadcom Corporation
Page 32
100BASE-TX False Carrier Sense Counter
Document 5222-DS02-405-R
100BASE-TX FALSE CARRIER SENSE COUNTER
FALSE CARRIER SENSE COUNTER [7:0]
This counter increments each time the BCM5222 detects a false carrier on the receive input. This counter automatically
clears itself when read. When the counter reaches its maximum value, FFh, it stops counting False Carrier Sense Errors
until cleared.
AUXILIARY CONTROL/STATUS REGISTER
The Auxiliary Control/Status register bit descriptions are shown in Table 19.
Table 18: 100BASE-TX False Carrier Sense Counter (Address 19d, 13h)
Bit
Name
R/W
Description
Default
15:8
Reserved
RO
Ignore these bits
00h
7:0
False Carrier Sense Counter
[7:0]
R/W
Number of false carrier sense events since last read
00h
Table 19: Auxiliary Control/Status Register (Address 11000b, 24d, 18h)
Bit
Name
R/W
Description
Default
15
Jabber Disable
R/W
1 = Jabber function disabled
0 = Jabber function enabled
0
14
Force Link
R/W
1 = Force link pass
0 = Normal link operation
0
13:9
Reserved
RO
Ignore when read
000000
8
10M Transmit Power Mode
R/W
1 = 10BASE-T Full Power Mode
0 = 10BASE-T Low Power Mode
0
7:6
HSQ : LSQ
R/W
These two bits define the squelch mode of the
10BASE-T Carrier Sense mechanism
00 = Normal Squelch
01 = Low Squelch
10 = High Squelch
11 = Not Allowed
00
5:4
Edge Rate [1:0]
R/W
00 = 1 ns
01 = 2 ns
10 = 3 ns
11 = 4 ns
11
3
Auto-Negotiation Indication
RO
1 = Auto-negotiation activated
0 = Speed forced manually
ANEN Pin
2
Force 100/10 Indication
RO
1 = Speed forced to 100BASE-TX
0 = Speed forced to 10BASE-T
1
Speed Indication
RO
1 = 100BASE-TX
0 = 10BASE-T
0
Full-Duplex Indication
RO
1 = Full-duplex active
0 = Full-duplex not active



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