Datasheet – SMSC LAN91C111 User Manual
Page 99
10/100 Non-PCI Ethernet Single Chip MAC + PHY
Datasheet
SMSC LAN91C111 REV C
99
Revision 1.91 (08-18-08)
DATASHEET
D0-D31
D0-D31
32 bit data bus. The bus byte(s) used to access the device are a function
of nBE0-nBE3:
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
nLDEV
nLDEV is a totem pole output. nLDEV is active on valid decodes of A15-
A4 and AEN=0.
UNUSED PINS
VCC
nRD nWR
GND
A1 nVLBUS
OPEN nDATCS
Table 12.1 VL Local Bus Signal Connections (continued)
VL BUS
SIGNAL
LAN91C111
SIGNAL
NOTES
nBE0
nBE1
nBE2
nBE3
0 0
0
0
Double word access
0
0
1
1
Low word access
1
1
0
0
High word access
0
1
1
1
Byte 0 access
1
0
1
1
Byte 1 access
1
1
0
1
Byte 2 access
1
1
1
0
Byte 3 access