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