Non-PCI Single-Chip Full Duplex Ethernet Controller
Chapter 4 Description of Pin Functions
PIN NO.
TQFP
QFP
PIN NAME
TYPE
DESCRIPTION
93
95
nROM
I/O4 with
This pin is sampled at the end of RESET. For Local Bus
operation this pin is left open and it is used as a ROM chip
select output that goes active when nMEMR is low and the
address bus contains a valid ROM address. In Local Bus
mode the LAN91C96I is pin compatible with the LAN91C92
and LAN91C94
pullup
26-28
30-36
37
39
40-46
28,29,
A0-9
I
**
I
I
I
**
Input address lines 0 through 9.
30, 32-38
39
41
42-48
A10/nFWE
A11/nFCS
A12-18
Local Bus - Input address line 10.
Local Bus - Input address line 11.
Input address lines 12 through 18.
47
52
49
54
A19/nCE1
I with
Local Bus - Input address line 19.
pullup
AEN/
nREG/
nAS
I with
Local Bus - Address enable input. Used as an address
pullup
qualifier. Address decoding is only enabled when AEN is low.
**
24
53
26
55
nSBHE/
I with
Local Bus - Byte High Enable input. Asserted (low) by the
system to indicate a data transfer on the upper data byte.
pullup
nCE2
**
IOCHRDY/
nWAIT
OD24
Local Bus - Output. Optionally used by the LAN91C96I to
extend host cycles.
with
pullup
55-58
57-60,
62-65,
9-12,
14-17
67
D0-15
I/O24
Bi-directional. 16 bit data bus used to access the LAN91C96I
internal registers. The data bus has weak internal pullups.
Supports direct connection to the system bus without
external buffering.
60-63 7-
10 12-15
65
25
17
RESET
IS with
pullup
**
Input. Active high Reset. This input is not considered active
unless it is active for at least 100ns to filter narrow glitches.
27
19
BALE/nWE
IS with
Local Bus - Input. Address strobe. For systems that require
address latching, the falling edge of BALE latches address
lines and nSBHE.
Local Bus - Active high interrupt signal. The interrupt line
selection is determined by the value of INT SEL1-0 bits in the
Configuration Register. This interrupt is tri-stated when not
selected.
pullup
**
O24
INTR0/
nIREQ/
INTR
18
20
20
22
INTR1/
O24
O24
Local Bus - Output. Active high interrupt signal. The interrupt
line selection is determined by the value of INT SEL1-0 bits
in the Configuration Register. This interrupt is tri-stated when
not selected.
Local Bus - Outputs. Active high interrupt signals. The
interrupt line selection is determined by the value of INT
SEL1-0 bits in the Configuration Register. These interrupts
are tri-stated when not selected.
nINPACK
INTR2
SMSC DS – LAN91C96I
Page 15
Rev. 11/18/2004
DATASHEET
SMSC [ SMSC CORPORATION ]
