user manual

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