LAN91C111 Datasheet, PDF (90/125 Pages) SMSC Corporation – 10/100 Non-PCI Ethernet Single Chip MAC + PHY

LAN91C111
TABLE 12-1: VL LOCAL BUS SIGNAL CONNECTIONS (CONTINUED)
VL Bus Signal LAN91C111 Signal
Notes
D0-D31
D0-D31
32 bit data bus. The bus byte(s) used to access the device are a function
of nBE0-nBE3:
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
nLDEV
VCC
GND
OPEN
nLDEV
nRD nWR
A1 nVLBUS
nDATCS
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
 2011-2016 Microchip Technology Inc.
DS00002276A-page 91