
Micrel, Inc.
KSZ8051MNL/RNL
July 2010
41
M9999-070910-1.0
Register Description (Continued)
Address
Name
Description
Mode
(1)
Default
1b.5
Page Receive
Interrupt
1 = Page Receive occurred
0 = Page Receive did not occur
RO/SC
0
1b.4
Parallel Detect
Fault Interrupt
1 = Parallel Detect Fault occurred
0 = Parallel Detect Fault did not occur
RO/SC
0
1b.3
Link Partner
Acknowledge
Interrupt
1 = Link Partner Acknowledge occurred
0 = Link Partner Acknowledge did not occur
RO/SC
0
1b.2
Link Down
Interrupt
1 = Link Down occurred
0 = Link Down did not occur
RO/SC
0
1b.1
Remote Fault
Interrupt
1 = Remote Fault occurred
0 = Remote Fault did not occur
RO/SC
0
1b.0
Link Up
Interrupt
1 = Link Up occurred
0 = Link Up did not occur
RO/SC
0
Register 1Dh – LinkMD
Control/Status
1d.15
Cable
Diagnostic
Test Enable
1 = Enable cable diagnostic test. After test
has completed, this bit is self-cleared.
0 = Indicates cable diagnostic test (if enabled)
has completed and the status information
is valid for read.
RW/SC
0
1d.14:13
Cable
Diagnostic
Test Result
[00] = normal condition
[01] = open condition has been detected in
cable
[10] = short condition has been detected in
cable
[11] = cable diagnostic test has failed
RO
00
1d.12
Short Cable
Indicator
1 = Short cable (<10 meter) has been detected
by LinkMD
.
RO
0
1d.11:9
Reserved
RW
000
1d.8:0
Cable Fault
Counter
Distance to fault
RO
0_0000_0000
Register 1Eh – PHY Control 1
1e.15:10
Reserved
RO
0000_00
1e.9
Enable Pause
(Flow Control)
1 = Flow control capable
0 = No flow control capability
RO
0
1e.8
Link Status
1 = Link is up
0 = Link is down
RO
0
1e.7
Polarity Status
1 = Polarity is reversed
0 = Polarity is not reversed
RO
1e.6
Reserved
RO
0
1e.5
MDI/MDI-X
State
1 = MDI-X
0 = MDI
RO
1e.4
Energy Detect
1 = Presence of signal on receive differential
pair
0 = No signal detected on receive differential
pair
RO
0