LAN91C100FD_08 Datasheet, PDF (56/77 Pages) SMSC Corporation – FEAST Fast Ethernet Controller with Full Duplex Capability

FEAST Fast Ethernet Controller with Full Duplex Capability
VL BUS
SIGNAL
nADS
IRQn
D0-D31
nLDEV
VCC
GND
OPEN
LAN91C100
SIGNAL
nADS, nCYCLE
INTR0-INTR3
D0-D31
NOTES
Address Strobe is connected directly to the VL bus. nCYCLE is
created typically by using nADS delayed by one LCLK.
Typically uses the interrupt lines on the ISA edge connector of
VL bus
32 bit data bus. The bus byte(s) used to access the device are a
function of nBE0-nBE3:
nBE0
0
0
1
0
1
1
1
nBE1
0
0
1
1
0
1
1
nBE2
0
1
0
1
1
0
1
nBE3
0
1
0
1
1
1
0
Double word access
Low word access
High word access
Byte 0 access
Byte 1 access
Byte 2 access
Byte 3 access
nLDEV
nRD nWR
A1 nVLBUS
nDATACS
Not used = tri-state on reads, ignored on writes. Note that nBE2
and nBE3 override the value of A1, which is tied low in this
application.
nLDEV is a totem pole output. nLDEV is active on valid decodes
of A15-A4 and AEN=0.
UNUSED PINS
Revision 1.0 (09-22-08)
Page 56
DATASHEET
SMSC LAN91C100FD Rev. D