Micrel, Inc.
KSZ9021RL/RN
Mode(1)
RO
Address
1.7
Name
Description
Default
Reserved
No Preamble
0
1
1.6
1 = Preamble suppression
RO
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
Register 2 (2h) – PHY Identifier 1
2.15:0
PHY ID
Number
Assigned to the 3rd through 18th bits of the
Organizationally Unique Identifier (OUI).
Kendin Communication’s OUI is 0010A1 (hex)
RO
RO
0022h
Register 3 (3h) – PHY Identifier 2
3.15:10
PHY ID
Number
Assigned to the 19th through 24th bits of the
Organizationally Unique Identifier (OUI).
Kendin Communication’s OUI is 0010A1 (hex)
0001_01
10_0001
3.9:4
3.3:0
Model Number Six bit manufacturer’s model number
RO
RO
Revision
Number
Four bit manufacturer’s revision number
Indicates silicon revision
Register 4 (4h) – Auto-Negotiation Advertisement
4.15
Next Page
1 = Next page capable
RW
0
0 = No next page capability.
4.14
4.13
Reserved
RO
0
0
Remote Fault
1 = Remote fault supported
0 = No remote fault
RW
4.12
Reserved
Pause
RO
0
4.11:10
[4.11, 4.10]
RW
00
[0,0] = No PAUSE
[1,0] = Asymmetric PAUSE (link partner)
[0,1] = Symmetric PAUSE
[1,1] = Symmetric & Asymmetric PAUSE
(local device)
4.9
4.8
100Base-T4
1 = T4 capable
RO
0
1
0 = No T4 capability
100Base-TX
Full-Duplex
1 = 100Mbps full-duplex capable
0 = No 100Mbps full-duplex capability
RW
M9999-101309-1.1
October 2009
36
MICREL [ MICREL SEMICONDUCTOR ]
