LAN9252SLASHML datasheet(18/329 Pages) MICROCHIP

18 / 329 page

LAN9252

DS00001909A-page 18

 2015 Microchip Technology Inc.

Note 1:

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 2:

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 A FX

Signal Detect

(SD)

FXSDA

ILVPECL

Port A 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 A FX

Loss Of Signal

(LOS)

FXLOSA

(PU)

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

selected (via fx_los_strap_1), 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 A FX-SD

Enable Strap

FXSDENA

Port A 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 2.

Note:

Port A is connected to the EtherCAT port 0 or 2.

TABLE 3-4:

LAN PORT B PIN DESCRIPTIONS

Num

Pins

Name

Symbol

Buffer

Type

Description

Port B TP TX/RX

Positive

Channel 1

TXPB

AIO

Port B Twisted Pair Transmit/Receive Positive

Channel 1. See Note 3

Port B FX TX

Positive

OLVPECL

Port B Fiber Transmit Positive.

Port B TP TX/RX

Negative

Channel 1

TXNB

AIO

Port B Twisted Pair Transmit/Receive Negative

Channel 1. See Note 3.

Port B FX TX

Negative

OLVPECL

Port B Fiber Transmit Negative.

TABLE 3-3:

LAN PORT A PIN DESCRIPTIONS (CONTINUED)

Num

Pins

Name

Symbol

Buffer

Type

Description

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