10/100 Non-PCI Ethernet Single Chip MAC + PHY
Datasheet
Table 12.1 VL Local Bus Signal Connections (continued)
VL BUS
SIGNAL
LAN91C111
NOTES
SIGNAL
D0-D31
D0-D31
32 bit data bus. The bus byte(s) used to access the device are a function
of nBE0-nBE3:
nBE0
nBE1
nBE2
nBE3
0
0
1
0
1
1
0
0
0
1
1
0
1
0
1
0
1
1
0
Double word access
1
0
1
1
1
Low word access
High word access
Byte 0 access
Byte 1 access
Byte 2 access
1
1
1
0
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
nLDEV
nLDEV is a totem pole output. nLDEV is active on valid decodes of A15-
A4 and AEN=0.
UNUSED PINS
VCC
nRD nWR
A1 nVLBUS
nDATCS
GND
OPEN
Revision 1.8 (07-13-05)
112
SMSC LAN91C111-REV B
DATASHEET
SMSC [ SMSC CORPORATION ]
