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Micrel, Inc.
KSZ8041NL/RNL
September 2010
33
M9999-090910-1.4
Register Description (Continued)
Address
Name
Description
Mode
(1)
Default
Register 0h – Basic Control
0.9
Restart Auto-
Negotiation
1 = Restart auto-negotiation process
0 = Normal operation.
This bit is self-cleared after a ‘1’ is written to it.
RW/SC
0
0.8
Duplex Mode
1 = Full-duplex
0 = Half-duplex
RW
Inverse of DUPLEX strapping pin
value.
See “Strapping Options” section
for details.
0.7
Collision Test
1 = Enable COL test
0 = Disable COL test
RW
0
0.6:1
Reserved
RO
000_000
0.0
Disable
Transmitter
0 = Enable transmitter
1 = Disable transmitter
RW
0
Register 1h – Basic Status
1.15
100Base-T4
1 = T4 capable
0 = Not T4 capable
RO
0
1.14
100Base-TX
Full Duplex
1 = Capable of 100Mbps full-duplex
0 = Not capable of 100Mbps full-duplex
RO
1
1.13
100Base-TX
Half Duplex
1 = Capable of 100Mbps half-duplex
0 = Not capable of 100Mbps half-duplex
RO
1
1.12
10Base-T Full
Duplex
1 = Capable of 10Mbps full-duplex
0 = Not capable of 10Mbps full-duplex
RO
1
1.11
10Base-T Half
Duplex
1 = Capable of 10Mbps half-duplex
0 = Not capable of 10Mbps half-duplex
RO
1
1.10:7
Reserved
RO
0000
1.6
No Preamble
1 = Preamble suppression
0 = Normal preamble
RO
1
1.5
Auto-
Negotiation
Complete
1 = Auto-negotiation process completed
0 = Auto-negotiation process not completed
RO
0
1.4
Remote Fault
1 = Remote fault
0 = No remote fault
RO/LH
0
1.3
Auto-
Negotiation
Ability
1 = Capable to perform auto-negotiation
0 = Not capable to perform auto-negotiation
RO
1
1.2
Link Status
1 = Link is up
0 = Link is down
RO/LL
0
1.1
Jabber Detect
1 = Jabber detected
0 = Jabber not detected (default is low)
RO/LH
0
1.0
Extended
Capability
1 = Supports extended capabilities registers
RO
1
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