LAN91C100 Datasheet, PDF (8/101 Pages) SMSC Corporation – FEAST™ Fast Ethernet Controller

DESCRIPTION OF PIN FUNCTIONSOF PIN FUNCTIONSPIN FUNCTIONS
PQFP/TQFP
PIN NO.
14,32,
46,50,
66,75,
82,94,
111,116,
120,122,
128,134,
138,169,
174,180,
185,200
NAME
Ground
SYMBOL
GND
BUFFER
TYPE
DESCRIPTION
Ground pins.
203
Analog
AGND
Ground
Analog ground pin.
2
Transmit TXEN
Enable
O4 Output. Used for 10 Mbps ENDEC. This pin
stays low when MIISEL is high.
201
Transmit TXD
Data
208
Carrier
Sense
CRS
207
Collision COL
Detection
206
Receive
RXD
Data
197
Transmit TXC
Clock
199
Receive
RXC
Clock
202
Loopback LBK
O4 NRZ transmit data output for 10 Mbps
ENDEC interface.
ID
Input. Carrier sense from 10 Mbps ENDEC
interface. This pin is ignored when MIISEL
is high.
ID
Input. Collision detection indication from 10
Mbps ENDEC interface. This pin is ignored
when MIISEL is high.
IP
NRZ receive data input from 10 Mbps
ENDEC interface. This pin is ignored when
MIISEL is high.
IP
Input. 10 MHz transmit clock used in 10
Mbps operation. This pin is ignored when
MIISEL is high.
IP
Input. 10Mhz receive clock recovered by the
10 Mbps ENDEC. This pin is ignored when
MIISEL is high.
O4 Output. Active when LOOP bit is set (TCR
bit 1). Independent of port selection
(MIISEL=X).
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