Specifications
Micrel, Inc.
KSZ8895MQ/RQ/FMQ
Port Registers (Continued)
Address Name Description Mode Default
4
Advertised Flow Control
Capability
1, advertise flow control capability.
0, suppress flow control capability from transmission to
link partner.
R/W 1
3
Advertised 100BT Full-
Duplex Capability
1, advertise 100BT full-duplex capability.
0, suppress 100BT full-duplex capability from
transmission to link partner.
R/W 1
2
Advertised 100BT Half-
Duplex Capability
1, advertise 100BT half-duplex capability.
0, suppress 100BT half-duplex capability from
transmission to link partner.
R/W 1
1
Advertised 10BT Full-
Duplex Capability
1, advertise 10BT full-duplex capability.
0, suppress 10BT full-duplex capability from
transmission to link partner.
R/W 1
0
Advertised 10BT Half-
Duplex Capability
1, advertise 10BT half-duplex capability.
0, suppress 10BT half-duplex capability from
transmission to link partner.
R/W 1
Register 29 (0x1D): Port 1 Control 6
Register 45 (0x2D): Port 2 Control 6
Register 61 (0x3D): Port 3 Control 6
Register 77 (0x4D): Port 4 Control 6
Register 93 (0x5D): Port 5 Control 6
Address Name Description Mode Default
7 LED Off
1, turn off all port’s LEDs (LEDx_2, LEDx_1, LEDx_0,
where “x” is the port number). These pins will be driven
high if this bit is set to one.
0, normal operation.
R/W 0
6 Txids
1, disable port’s transmitter.
0, normal operation.
R/W 0
5 Restart AN
1, restart auto-negotiation.
0, normal operation.
R/W
(SC)
0
4 FX reserved N/A RO 0
3 Power Down
1, power down.
0, normal operation.
R/W 0
2 Disable Auto MDI/MDI-X
1, disable auto MDI/MDI-X function.
0, enable auto MDI/MDI-X function.
R/W 0
1 Forced MDI
1, if auto MDI/MDI-X is disabled, force PHY into MDI
mode (transmit on RX pair).
0, MDI-X mode (transmit on TX pair).
R/W 0
0 MAC Loopback
1, Perform MAC loopback, loop back path as follows:
E.g. set port 1 MAC Loopback (reg. 29, bit 0 = ‘1’), use
port 2 as monitor port. The packets will transfer
Start: Port 2 receiving (also can start to receive
packets from port 3, 4, 5).
Loop-back: Port 1’s MAC.
End: Port 2 transmitting (also can end at Port 3, 4,
5 respectively).
Setting reg. 45, 61, 77, 93, bit 0 = ‘1’ will perform MAC
loopback on port 2, 3, 4, 5 respectively.
0, Normal Operation.
R/W 0
March 12, 2014
71
Revision 1.7