Datasheet

KSZ8863MLL/FLL/RLL
DS00002335B-page 50  2017 Microchip Technology Inc.
4 Vct_en
R/W
(SC)
1 = Enable cable diagnostic test. After VCT test has
completed, this bit will be self-cleared.
0 = Indicate cable diagnostic test (if enabled) has
completed and the status information is valid for read.
0
3 Force_lnk R/W
1 = Force link pass
0 = Normal Operation
0
2 Reserved RO
Reserved
Do not change the default value.
0
1 Remote Loopback R/W
1 = Perform Remote loopback, 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)
Port 2 (reg. 42, bit 1 = ‘1’)
Start: RXP2/RXM2 (port 2)
Loopback: PMD/PMA of port 2’s PHY
End: TXP2/TXM2 (port 2)
0 = Normal Operation
0
0 Vct_fault_count[8] RO
Bit[8] of VCT fault count
Distance to the fault.
It’s approximately 0.4m*vct_fault_count[8:0]
0
Register 27 (0x1B): Port 1 LinkMD Result
Register 43 (0x2B): Port 2 LinkMD Result
Register 59 (0x3B): Reserved, Not Applicable to Port 3
7-0 Vct_fault_count[7:0] RO
Bits[7:0] of VCT fault count
Distance to the fault.
It’s approximately 0.4m*Vct_fault_count[8:0]
0x00
Register 28 (0x1C): Port 1 Control 12
Register 44 (0x2C): Port 2 Control 12
Register 60 (0x3C): Reserved, Not Applicable to Port 3
7
Auto Negotiation
Enable
R/W
1 = auto negotiation is on
0 = disable auto negotiation; speed and duplex are
determined by bits 6 and 5 of this register.
1
For port 1,
P1LED0 pin
value during
reset.
(default is PD)
For port 2,
SMRXD33 pin
value during
reset
6 Force Speed R/W
1 = forced 100BT if AN is disabled (bit 7)
0 = forced 10BT if AN is disabled (bit 7)
1
For port 1,
P1LED1 pin
value during
reset.
For port 2,
SMRXD32 pin
value during
reset.
TABLE 4-7: PORT REGISTERS (REGISTERS 16 - 95) (CONTINUED)
Bit Name R/W Description Default