KSZ8081MNX Datasheet, PDF (50/69 Pages) Micrel Semiconductor – 10Base-T/100Base-TX Physical Layer Transceiver

Micrel, Inc.
Register Description (Continued)
Address
Name
Description
Register 1Eh – PHY Control 1
1E.15:10
Reserved Reserved
1E.9
1E.8
1E.7
1E.6
1E.5
1E.4
1E.3
1E.2:0
Enable Pause
(Flow Control)
Link Status
Polarity Status
Reserved
MDI/MDI-X
State
Energy Detect
PHY Isolate
Operation
Mode
Indication
1 = Flow control capable
0 = No flow control capability
1 = Link is up
0 = Link is down
1 = Polarity is reversed
0 = Polarity is not reversed
Reserved
1 = MDI-X
0 = MDI
1 = Signal present on receive differential
pair
0 = No signal detected on receive differential
pair
1 = PHY in isolate mode
0 = PHY in normal operation
[000] = Still in auto-negotiation
[001] = 10Base-T half-duplex
[010] = 100Base-TX half-duplex
[011] = Reserved
[100] = Reserved
[101] = 10Base-T full-duplex
[110] = 100Base-TX full-duplex
[111] = Reserved
Register 1Fh – PHY Control 2
1F.15
1F.14
1F.13
HP_MDIX
MDI/MDI-X
Select
Pair Swap
Disable
1 = HP Auto MDI/MDI-X mode
0 = Micrel Auto MDI/MDI-X mode
When Auto MDI/MDI-X is disabled,
1 = MDI-X mode
Transmit on RXP,RXM (pins 5, 4) and
Receive on TXP,TXM (pins 7, 6)
0 = MDI mode
Transmit on TXP,TXM (pins 7, 6) and
Receive on RXP,RXM (pins 5, 4)
1 = Disable Auto MDI/MDI-X
0 = Enable Auto MDI/MDI-X
1F.12
Reserved Reserved
Mode⁽¹⁰⁾
RO
RO
RO
RO
RO
RO
RO
RW
RO
RW
RW
RW
RW
KSZ8081MNX/KSZ8081RNB
Default
0000_00
0
0
0
0
0
000
1
0
0
0
August 19, 2015
50
Revision 1.4