Micrel, Inc.
KSZ9021RL/RN
Mode(1)
Address
Name
Description
Default
19.1
100Base-TX
Link Status
100 Base-TX Link Status
1 = Link status is OK
RO
0
0 = Link status is not OK
19.0
Reserved
RO
0
Register 21 (15h) – RXER Counter
21.15:0
RXER Counter Receive error counter for Symbol Error frames
RO/RC
RW
0000_0000_0000_0000
0
Register 27 (1Bh) – Interrupt Control/Status
27.15
27.14
27.13
27.12
27.11
Jabber
Interrupt
Enable
1 = Enable Jabber Interrupt
0 = Disable Jabber Interrupt
Receive Error
Interrupt
Enable
1 = Enable Receive Error Interrupt
0 = Disable Receive Error Interrupt
RW
RW
RW
RW
0
0
0
0
Page Received 1 = Enable Page Received Interrupt
Interrupt
Enable
0 = Disable Page Received Interrupt
Parallel Detect 1 = Enable Parallel Detect Fault Interrupt
Fault Interrupt
Enable
0 = Disable Parallel Detect Fault Interrupt
Link Partner
Acknowledge
Interrupt
1 = Enable Link Partner Acknowledge Interrupt
0 = Disable Link Partner Acknowledge
Interrupt
Enable
27.10
27.9
27.8
Link Down
Interrupt
Enable
1 = Enable Link Down Interrupt
0 = Disable Link Down Interrupt
RW
RW
RW
0
0
0
Remote Fault
Interrupt
Enable
1 = Enable Remote Fault Interrupt
0 = Disable Remote Fault Interrupt
Link Up
Interrupt
Enable
1 = Enable Link Up Interrupt
0 = Disable Link Up Interrupt
27.7
27.6
27.5
27.4
27.3
Jabber
Interrupt
1 = Jabber occurred
RO/RC
RO/RC
RO/RC
RO/RC
RO/RC
0
0
0
0
0
0 = Jabber did not occurred
1 = Receive Error occurred
0 = Receive Error did not occurred
1 = Page Receive occurred
0 = Page Receive did not occurred
Receive Error
Interrupt
Page Receive
Interrupt
Parallel Detect 1 = Parallel Detect Fault occurred
Fault Interrupt
0 = Parallel Detect Fault did not occurred
Link Partner
Acknowledge
Interrupt
1 = Link Partner Acknowledge occurred
0 = Link Partner Acknowledge did not occurred
27.2
27.1
Link Down
Interrupt
1 = Link Down occurred
RO/RC
RO/RC
0
0
0 = Link Down did not occurred
1 = Remote Fault occurred
0 = Remote Fault did not occurred
Remote Fault
Interrupt
M9999-101309-1.1
October 2009
42
MICREL [ MICREL SEMICONDUCTOR ]
