Datasheet

 2016-2018 Microchip Technology Inc. DS00002202C-page 37
KSZ8081MNX/RNB
1.11
10BASE-T 
Half-Duplex
1 = Capable of 10 Mbps half-duplex
0 = Not capable of 10 Mbps half-
duplex
RO 1
1.10:7 Reserved Reserved RO 000_0
1.6 No Preamble
1 = Preamble suppression
0 = Normal preamble
RO 1
1.5
Auto-Negotia-
tion 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-Negotia-
tion Ability
1 = Can perform auto-negotiation
0 = Cannot 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 capability
registers
RO 1
Register 2h – PHY Identifier 1
2.15:0
PHY ID Num-
ber
Assigned to the 3rd through 18th bits
of the Organizationally Unique Identi-
fier (OUI). KENDIN Communication’s
OUI is 0010A1 (hex).
RO 0022h
Register 3h – PHY Identifier 2
3.15:10
PHY ID Num-
ber
Assigned to the 19th through 24th
bits of the Organizationally Unique
Identifier (OUI). KENDIN Communi-
cation’s OUI is 0010A1 (hex).
RO 0001_01
3.9:4 Model Number Six-bit manufacturer’s model number RO 01_0110
3.3:0
Revision Num-
ber
Four-bit manufacturer’s revision
number
RO
Rev. A and Rev. A2=0x0.
Rev. A3=0x1
Register 4h – Auto-Negotiation Advertisement
4.15 Next Page
1 = Next page capable
0 = No next page capability
Note: Recommended to set this bit to
“0”.
RW 1
4.14 Reserved Reserved RO 0
4.13 Remote Fault
1 = Remote fault supported
0 = No remote fault
RW 0
4.12 Reserved Reserved RO 0
4.11:10 Pause
[00] = No pause
[10] = Asymmetric pause
[01] = Symmetric pause
[11] = Asymmetric and symmetric
pause
RW 00
4.9 100BASE-T4
1 = T4 capable
0 = No T4 capability
RO 0
TABLE 4-2: REGISTER DESCRIPTION (CONTINUED)
Address Name Description Mode Default