LAN9252VSLASHML datasheet(19/329 Pages) MICROCHIP

19 / 329 page

 2015 Microchip Technology Inc.

DS00001909A-page 19

LAN9252

Note 3:

In copper mode, either channel 1 or 2 may function as the transmit pair while the other channel functions as

the receive pair. The pin name symbols for the twisted pair pins apply to a normal connection. If HP Auto-

MDIX is enabled and a reverse connection is detected or manually selected, the RX and TX pins will be

swapped internally.

Note 4:

Configuration strap pins are identified by an underlined symbol name. Configuration strap values are

latched on power-on reset or RST# de-assertion. Refer to Section 7.0, "Configuration Straps," on page 51

for more information.

Port BTP TX/RX

Positive

Channel 2

RXPB

AIO

Port B Twisted Pair Transmit/Receive Positive

Channel 2. See Note 3.

Port B FX RX

Positive

Port B Fiber Receive Positive.

Port B TP TX/RX

Negative

Channel 2

RXNB

AIO

Port B Twisted Pair Transmit/Receive Negative

Channel 2. See Note 3.

Port B FX RX

Negative

Port B Fiber Receive Negative.

Port B FX

Signal Detect

(SD)

FXSDB

ILVPECL

Port B Fiber Signal Detect. When FX-LOS mode is

not selected, this pin functions as the Signal Detect

input from the external transceiver. A level above

2 V (typ.) indicates valid signal.

When FX-LOS mode is selected, the input buffer is

disabled.

Port B FX

Loss Of Signal

(LOS)

FXLOSB

(PU)

Port B Fiber Loss of Signal. When FX-LOS mode is

selected (via fx_los_strap_2), this pin functions as

the Loss of Signal input from the external trans-

ceiver. A high indicates LOS while a low indicates

valid signal.

When FX-LOS mode is not selected, the input buffer

and pull-up are disabled.

Port B FX-SD

Enable Strap

FXSDENB

Port B FX-SD Enable. When FX-LOS mode is not

selected, this strap input selects between FX-SD

and copper twisted pair mode. A level above 1 V

(typ.) selects FX-SD.

When FX-LOS mode is selected, the input buffer is

disabled.

See Note 4.

Note:

Port B is connected to EtherCAT port 1.

TABLE 3-4:

LAN PORT B PIN DESCRIPTIONS (CONTINUED)

Num

Pins

Name

Symbol

Buffer

Type

Description

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