ksz8021rnli Micrel Semiconductor, ksz8021rnli Datasheet - Page 31

• Manufacturer Part Number: ksz8021rnli
• Description: 10base-t/100base-tx Phy With Rmii Support
• Manufacturer: Micrel Semiconductor

Micrel, Inc.
Register Description (Continued)
August 2010
Register 1Eh – PHY Control 1
Register 1Fh – PHY Control 2
Address
1e.15:10
1e.2:0
1f:15
1f:14
1f:13
1f.12
1f.11
1e.9
1e.8
1e.7
1e.6
1e.5
1e.4
1e.3
Polarity Status
Energy Detect
Enable Pause
(Flow Control)
PHY Isolate
Link Status
MDI/MDI-X
MDI/MDI-X
Force Link
Pair Swap
Operation
HP_MDIX
Reserved
Reserved
Indication
Reserved
Disable
Name
Select
Mode
State
Description
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
1 = MDI-X
0 = MDI
1 = Presence of signal on receive differential
0 = No signal detected on receive differential
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
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
0 = MDI Mode
1 = Disable auto MDI/MDI-X
0 = Enable auto MDI/MDI-X
1 = Force link pass
0 = Normal link operation
This bit bypasses the control logic and allow
transmitter to send pattern even if there is no
link.
Transmit on TXP,TXM (pins 6,5) and
Receive on RXP,RXM (pins 4,3)
pair
pair
Transmit on RXP,RXM (pins 4,3) and
Receive on TXP,TXM (pins 6,5)
31
Mode
RO
RO
RO
RO
RO
RO
RO
RW
RO
RW
RW
RW
RW
RW
(1)
Default
0000_00
0
0
0
0
0
000
1
0
0
0
0
KSZ8021RNL / KSZ8031RNL
M9999-082710-1.0