Datasheet

 2017 Microchip Technology Inc. DS00002348A-page 55
KSZ8873MLL/FLL/RLL
0 Loopback R/W
1 = perform loopback, as indicated:
Port 1 Loopback (reg. 29, bit 0 = ‘1’)
Start: RXP2/RXM2 (port 2)
Loopback: PMD/PMA of port 1’s PHY
End: TXP2/TXM2 (port 2)
Port 2 Loopback (reg. 45, bit 0 = ‘1’)
Start: RXP1/RXM1 (port 1)
Loopback: PMD/PMA of port 2’s PHY
End: TXP1/TXM1 (port 1)
0 = normal operation
0
Register 30 (0x1E): Port 1 Status 0
Register 46 (0x2E): Port 2 Status 0
Register 62 (0x3E): Reserved, Not Applicable to Port 3
7 MDI-X Status RO
1 = MDI
0 = MDI-X
0
6 AN Done RO
1 = auto-negotiation completed
0 = auto-negotiation not completed
0
5 Link Good RO
1 = link good
0 = link not good
0
4
Partner Flow Con-
trol Capability
RO
1 = link partner flow control (pause) capable
0 = link partner not flow control (pause) capable
0
3
Partner 100BT Full-
Duplex Capability
RO
1 = link partner 100BT full-duplex capable
0 = link partner not 100BT full-duplex capable
0
2
Partner 100BT Half-
Duplex Capability
RO
1 = link partner 100BT half-duplex capable
0 = link partner not 100BT half-duplex capable
0
1
Partner 10BT Full-
Duplex Capability
RO
1 = link partner 10BT full-duplex capable
0 = link partner not 10BT full-duplex capable
0
0
Partner 10BT Half-
Duplex Capability
RO
1 = link partner 10BT half-duplex capable
0 = link partner not 10BT half-duplex capable
0
Register 31 (0x1F): Port 1 Status 1
Register 47 (0x2F): Port 2 Status 1
Register 63 (0x3F): Port 3 Status 1
7 Hp_mdix R/W
1 = HP Auto MDI/MDI-X mode
0 = Microchip Auto MDI/MDI-X mode
1
Note: Only ports
1 and 2 are PHY
ports.
This bit is not
applicable to
port 3 (MII).
6 Reserved RO
Reserved
Do not change the default value.
0
5Polrvs RO
1 = polarity is reversed
0 = polarity is not reversed
0
Note: This bit is
not applicable to
port 3 (MII).
This bit is only
valid for 10BT
4
Transmit Flow
Control Enable
RO
1 = transmit flow control feature is active
0 = transmit flow control feature is inactive
0
3
Receive Flow
Control Enable
RO
1 = receive flow control feature is active
0 = receive flow control feature is inactive
0
TABLE 4-7: PORT REGISTERS (REGISTERS 16 - 95) (CONTINUED)
Bit Name R/W Description Default