LAN9353 Datasheet, PDF (17/523 Pages) Microchip Technology – Interfaces at up to 200Mbps via Turbo MII

LAN9353
TABLE 3-3: LAN PORT A PIN DESCRIPTIONS (CONTINUED)
Num
Pins
Name
Port A FX
Signal Detect
(SD)
Port A FX
Loss Of Signal
1
(LOS)
Symbol
FXSDA
FXLOSA
Buffer
Type
ILVPECL
Description
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.
IS
(PU)
When FX-LOS mode is selected, the input buffer is
disabled.
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.
Port A FX-SD
Enable Strap
FXSDENA
When FX-LOS mode is not selected, the input buffer
and pull-up are disabled.
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.
AI
When FX-LOS mode is selected, the input buffer is
disabled.
See Note 2.
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 67
for more information.
Note: Port A is connected to the Switch Fabric port 1.
TABLE 3-4: LAN PORT B PIN DESCRIPTIONS
Num
Pins
Name
Port B TP TX/RX
Positive
1
Channel 1
Port B FX TX
Positive
Port B TP TX/RX
Negative
1
Channel 1
Port B FX TX
Negative
Symbol
TXPB
TXNB
Buffer
Type
AIO
Description
Port B Twisted Pair Transmit/Receive Positive
Channel 1. See Note 3
OLVPECL ^{Port B Fiber Transmit Positive.}
Port B Twisted Pair Transmit/Receive Negative
AIO Channel 1. See Note 3.
OLVPECL ^{Port B Fiber Transmit Negative.}
 2015 Microchip Technology Inc.
DS00001925A-page 17