Datasheet

 2016-2017 Microchip Technology Inc. DS00002112B-page 61
KSZ8795CLX
2 Operation Speed 1 = Link speed is 100 Mbps
0 = Link speed is 10 Mbps
RO 0
1 Operation Duplex 1 = Link duplex is full
0 = Link duplex is half
RO 0
0 Reserved N/A Don’t Change. RO 0
Register 26 (0x1A): Port 1 PHY
Control 8
Register 42 (0x2A): Port 2 PHY
Control 8
Register 58 (0x3A): Port 3 PHY
Control 8
Register 74 (0x4A): Port 4 PHY
Control 8
Register 90 (0x5A): Reserved
(Note 4-1)
7 CDT 10M Short
Note: CDT means
Cable Diag-
nostic Test
1 = Less than 10 meter short RO 0
6  5 CDT_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 CDT_Enable 1 = Enable cable diagnostic test. After CDT test
has completed, this bit will be self-cleared.
0 = Indicates that the cable diagnostic test (if
enabled) has Indicate cable diagnostic test.
R/W
(SC)
0
3 Force_Link 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 Bit[1] = ‘1’ will perform
remote loopback on Ports 2, 3, 4.
0 = Normal Operation.
R/W 0
0 CDT_Fault_Count[8] Bit[8] of CDT Fault Count
Distance to the fault.
It’s approximately 0.4 × CDT_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): Reserved
7  0 CDT_Fault_Count[7:0] Bits[7:0] of CDT Fault Count
Distance to the fault. It’s approximately 0.4m ×
CDT_Fault_Count[8:0]
RO 0x00
TABLE 4-4: PORT REGISTERS (CONTINUED)
Address Name Description Mode Default