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KSZ8873MLLJ Datasheet(PDF) 61 Page - Micrel Semiconductor

Part No. KSZ8873MLLJ
Description  Integrated 3-Port 10/100 Managed Switch with PHYs
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Maker  MICREL [Micrel Semiconductor]
Homepage  http://www.micrel.com
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KSZ8873MLLJ Datasheet(HTML) 61 Page - Micrel Semiconductor

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Micrel, Inc.
KSZ8873MLLJ
September 2011
61
M9999-091911-1.8
Register 26 (0x1A): Port 1 PHY Special Control/Status
Register 42 (0x2A): Port 2 PHY Special Control/Status
Register 58 (0x3A): Reserved, not applied to port 3
Bit
Name
R/W
Description
Default
7
Vct 10M Short
RO
=1, Less than 10 meter short
0
6-5
Vct_result
RO
=00, Normal condition
=01, Open condition detected in cable
=10, Short condition detected in cable
=11, Cable diagnostic test has failed
00
4
Vct_en
R/W
(SC)
=1, Enable cable diagnostic test. After VCT test has completed,
this bit will be self-cleared.
=0, Indicate cable diagnostic test (if enabled) has completed and
the status information is valid for read.
0
3
Force_lnk
R/W
=1, Force link pass
=0, Normal Operation
0
2
Reserved
RO
Reserved
Do not change the default value.
0
1
Remote Loopback
R/W
=1, Perform Remote loopback, as follows:
Port 1 (reg. 26, bit 1 = ‘1’)
Start: RXP1/RXM1 (port 1)
Loopback: PMD/PMA of port 1’s PHY
End: TXP1/TXM1 (port 1)
Port 2 (reg. 42, bit 1 = ‘1’)
Start: RXP2/RXM2 (port 2)
Loopback: PMD/PMA of port 2’s PHY
End: TXP2/TXM2 (port 2)
=0, Normal Operation
0
0
Vct_fault_count[8]
RO
Bit[8] of VCT fault count
Distance to the fault.
It’s approximately 0.4m*vct_fault_count[8:0]
0
Register 27 (0x1B): Port 1 Not Support
Register 43 (0x2B): LinkMD Result
Register 59 (0x3B): Reserved, not applied to port 3
Bit
Name
R/W
Description
Default
7-0
Vct_fault_count[7:
0]
RO
Bits[7:0] of VCT fault count
Distance to the fault.
It’s approximately 0.4m*Vct_fault_count[8:0]
0x00


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