LAN91C111_11 Datasheet, PDF (104/133 Pages) SMSC Corporation – 10/100 Non-PCI Ethernet Single Chip MAC + PHY

VL BUS
SIGNAL
IRQn
D0-D31
10/100 Non-PCI Ethernet Single Chip MAC + PHY
Datasheet
Table 12.1 VL Local Bus Signal Connections (continued)
LAN91C111
SIGNAL
INTR0
D0-D31
NOTES
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:
nLDEV
VCC
GND
OPEN
nLDEV
nRD nWR
A1 nVLBUS
nDATCS
nBE0
0
0
0
1
0
1
1
1
nBE1
0
0
1
1
0
1
1
nBE2
0
1
0
1
1
0
1
nBE3
Double word access
1
0
1
1
1
0
Low word access
High word access
Byte 0 access
Byte 1 access
Byte 2 access
Byte 3 access
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 1.92 (06-27-11)
104
DATASHEET
SMSC LAN91C111 REV C