KSZ8851-16MLLU Micrel, KSZ8851-16MLLU Datasheet - Page 19

• Manufacturer Part Number: KSZ8851-16MLLU
• Description: Ethernet ICs Single-Port Ethernet Controller (Automotive Grade)
• Manufacturer: Micrel

Specifications of KSZ8851-16MLLU

• Rohs: yes
• Product: Ethernet Controllers
• Package / Case: LQFP-48
• Mounting Style: SMD/SMT

MDI/MDI-X Auto Crossover
To eliminate the need for crossover cables between similar devices, the KSZ8851-16MLL supports HP-Auto MDI/MDI-X
and IEEE 802.3u standard MDI/MDI-X auto crossover. HP-Auto MDI/MDI-X is the default.
The auto-sense function detects remote transmit and receive pairs and correctly assigns the transmit and receive pairs for
the KSZ8851-16MLL device. This feature is extremely useful when end users are unaware of cable types in addition to
saving on an additional uplink configuration connection. The auto-crossover feature can be disabled through the port
control registers. The IEEE 802.3u standard MDI and MDI-X definitions are as below:
May 2012
Micrel, Inc.
RJ45 Pins
1
2
3
6
Table 2. MDI/MDI-X Pin Definitions
MDI
Signals
TD+
RD+
TD-
RD-
19
RJ45 Pins
1
2
3
6
MDI-X
Signals
RD+
TD+
RD-
TD-
KSZ8851-16MLL/MLLI
M9999-050112-2.1