Datasheet
2017 Microchip Technology Inc. DS00002436B-page 41
KSZ8041TL/FTL/MLL
Note 4-1 RW = Read/Write; RO = Read Only; SC = Self-Cleared; LH = Latch High; LL = Latch Low
1E.7
Remote
Loopback
0 = Normal mode
1 = Remote (analog) loopback is enable
RW 0
1E.6:0 Reserved — — —
Register 1Fh – PHY Control 2
1F.15 HP_MDIX
0 = Microchip Auto MDI/MDI-X mode
1 = HP Auto MDI/MDI-X mode
RW 1
1F.14
MDI/MDI-X
Select
When Auto MDI/MDI-X is disabled,
0 = MDI Mode
Transmit on TX+/- (pins 12,11) and Receive on
RX+/- (pins 10,9)
1 = MDI-X Mode
Transmit on RX+/- (pins 10,9) and Receive on
TX+/- (pins 12,11)
RW 0
1F.13
Pairswap
Disable
1 = Disable auto MDI/MDI-X
0 = Enable auto MDI/MDI-X
RW 0
1F.12
Energy
Detect
1 = Presence of signal on RX+/- analog wire pair
0 = No signal detected on RX+/-
RO 0
1F.11 Force Link
1 = Force link pass
0 = Normal link operation
This bit bypasses the control logic and allows
transmitter to send pattern even if there is no link.
RW 0
1F.10
Power
Saving
1 = Enable power saving
0 = Disable power saving
If power saving mode is enabled and the cable is
disconnected, the RXC clock output (in MII mode)
is disabled. RXC clock is enabled after the cable is
connected and link is established.
RW 0
1F.9
Interrupt
Level
1 = Interrupt pin active-high
0 = Interrupt pin active-low
RW 0
1F.8
Enable
Jabber
1 = Enable jabber counter
0 = Disable jabber counter
RW 1
1F.7
Auto-
Negotiation
Complete
1 = Auto-negotiation process completed
0 = Auto-negotiation process not completed
RO 0
1F.6
Enable
Pause (Flow
Control)
1 = Flow control capable
0 = No flow control capability
RO 0
1F.5 PHY Isolate
1 = PHY in isolate mode
0 = PHY in normal operation
RO 0
1F.4:2
Operation
Mode
Indication
[000] = Still in auto-negotiation
[001] = 10BASE-T half-duplex
[010] = 100BASE-TX half-duplex
[011] = Reserved
[101] = 10BASE-T full-duplex
[110] = 100BASE-TX full-duplex
[111] = Reserved
RO 000
1F.1
Enable SQE
Test
1 = Enable SQE test
0 = Disable SQE test
RW 0
1F.0
Disable Data
Scrambling
1 = Disable scrambler
0 = Enable scrambler
RW 0
TABLE 4-2: REGISTER DESCRIPTIONS (CONTINUED)
Address Name Description
Mode
Note 4-1
Default