91C94 Datasheet, PDF (12/120 Pages) SMSC Corporation – ISA/PCMCIA SINGLE CHIP ETHERNET CONTROLLER WITH RAM

PIN NUMBER
VTQFP/
QFP TQFP
NAME
69
67 nBoard
Select Led
SYMBOL
nBSELED/
RXD
BUFFER
TYPE
OD16
DESCRIPTION
INTERNAL ENDEC - Board Select LED
activated by accesses to I/O space
(nIORD or nIOWR active with AEN low
and valid address decode for ISA, and
with nREG low and COR0 high for
PCMCIA). The pulse is stretched
beyond the access duration to make
the LED visible
I with
pullup
EXTERNAL ENDEC - NRZ receive
data input
71
69 nReceive
nRXLED/ OD16 INTERNAL ENDEC - Receive LED
Led/
nRXCLK
output
nReceive
Clock
I with EXTERNAL ENDEC - Receive clock
pullup input
70
68 nLink LED nLNKLED/ OD16 INTERNAL ENDEC - Link LED output .
TXD
Note: The output will not be driven
low during a reset
O162
EXTERNAL ENDEC - Transmit Data
output.
3
1 Enable
ENEEP
I with Input - This active high input enables
EEPROM
pullup the EEPROM to be read or written by
the LAN91C94. Internally pulled up.
Must be connected to ground if no
serial EEPROM is used
93
91 nEnable 16 nEN16
I with Input - When low the LAN91C94 is
Bit
pullup configured for 16 bit bus operation. If
left open the LAN91C94 works in 8 bit
bus mode. 16 bit configuration can
also be programmed via serial
EEPROM, software initialization of the
CONFIGURATION REGISTER, and
PCMCIA configuration space
12