Specifications

Micrel, Inc.
KSZ8895MQ/RQ/FMQ
Port Registers (Continued)
Register 25 (0x19): Port 1 Status 0
Register 41 (0x29): Port 2 Status 0
Register 57 (0x39): Port 3 Status 0
Register 73 (0x49): Port 4 Status 0
Register 89 (0x59): Port 5 Status 0
Address Name Description Mode Default
7 Hp_mdix
1 = HP Auto MDI/MDI-X mode
0 = Micrel Auto MDI/MDI-X mode
R/W 1
6 Factory Testing N/A Do not change. RO 0
5 Polrvs
1 = Polarity is reversed
0 = Polarity is not reversed
RO 0
4
Transmit Flow Control
Enable
1 = Transmit flow control feature is active
0 = Transmit flow control feature is inactive
RO 0
3
Receive Flow Control
Enable
1 = Receive flow control feature is active
0 = Receive flow control feature is inactive
RO 0
2 Operation Speed
1 = Link speed is 100Mbps
0 = Link speed is 10Mbps
RO 0
1 Operation Duplex
1 = Link duplex is full
0 = Link duplex is half
RO 0
0 Reserved N/A Do not change. RO 0
Register 26 (0x1A): Port 1 PHY Special Control/Status
Register 42 (0x2A): Port 2 PHY Special Control/Status
Register 58 (0x3A): Port 3 PHY Special Control/Status
Register 74 (0x4A): Port 4 PHY Special Control/Status
Register 90 (0x5A): Port 5 PHY Special Control/Status
Address Name Description Mode Default
7-4 Reserved N/A Do not change. RO 0000
3 Force_lnk
1 = Force link pass
0 = Normal Operation
R/W 0
2 Pwrsave
1 = Enable power saving
0 = Disable power saving
R/W 0
1 Remote Loopback
1 = Perform Remote loopback, loopback on port 1 as
follows:
Port 1 (reg. 26, bit 1 = ‘1’)
Start : RXP1/RXM1 (port 1)
Loopback: PMD/PMA of port 1’s PHY
End: TXP1/TXM1 (port 1)
Setting reg. 42, 58, 74, 90, bit 1 = ‘1’ will perform
remote loopback on port 2, 3, 4, 5.
0 = Normal Operation.
R/W 0
0 Reserved N/A Do not change. RO 0
March 12, 2014
69
Revision 1.7