Datasheet

KSZ8895MQX/RQX/FQX/MLX
DS00002246A-page 58  2016 Microchip Technology Inc.
6 - 5 Vct_result
00 = Normal condition
01 = Open condition detected in cable
10 = Short condition detected in cable
11 = Cable diagnostic test has failed
RO 00
4 Vct_enable
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.
R/W
(SC)
0
3 Force_lnk
1 = Force link pass
0 = Normal Operation
R/W 0
2Pwrsave
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 per-
form remote loopback on port 2, 3, 4, 5.
0 = Normal Operation.
R/W 0
0
Vct_-
fault_count[8]
Bits[8] of VCT fault count
Distance to the fault.
It’s approximately 0.4m x Vct_fault_count[8:0]
RO 0
Register 27 (0x1B): Port 1 LinkMD result
Register 43 (0x2B): Port 2 LinkMD result
Register 59 (0x3B): Port 3 LinkMD result
Register 75 (0x4B): Port 4 LinkMD result
Register 91 (0x5B): Port 5 LinkMD result
7 - 0
Vct_-
fault_count
[7:0]
Bits [7:0] of VCT fault count
Distance to the fault.
It’s approximately 0.4m x Vct_fault_count[8:0]
RO 0
Register 28 (0x1C): Port 1 Control 5
Register 44 (0x2C): Port 2 Control 5
Register 60 (0x3C): Port 3 Control 5
Register 76 (0x4C): Port 4 Control 5
Register 92 (0x5C): Port 5 Control 5
7
Disable Auto-
Negotiation
1, disable auto-negotiation, speed and duplex are
decided by bit 6 and 5 of the same register.
0, auto-negotiation is on.
Note: The register bit value is the INVERT of the
strap value at the pin.
R/W
0
For Port 3/Port 4 only.
INVERT of pins
LED[2][1]/LED[5][0]
strap option.
PD(0): Disable Auto-
Negotiation.
PU(1): Enable Auto-
Negotiation.
Note: LED[2][1]/
LED[5][0] have inter-
nal pull up.
6
Forced
Speed
1, forced 100BT if AN is disabled (bit 7).
0, forced 10BT if AN is disabled (bit 7).
R/W 1
TABLE 4-3: PORT REGISTERS (CONTINUED)
Address Name Description Mode Default