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LAN91C94 Datasheet(PDF) 35 Page - SMSC Corporation

Part # LAN91C94
Description  ISA/PCMCIA SINGLE CHIP ETHERNET CONTROLLER WITH RAM
PDF  120 Pages
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Manufacturer  SMSC [SMSC Corporation]
Direct Link  http://www.smsc.com
Logo SMSC - SMSC Corporation

LAN91C94 Datasheet(HTML) 35 Page - SMSC Corporation

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35
BANK SELECT REGISTER
OFFSET
E
NAME
BANK SELECT REGISTER
TYPE
READ/WRITE
SYMBOL
BSR
HIGH
BYTE
0
0
1
1
0
0
1
1
0
0
1
1
0
0
1
1
LOW
BYTE
BS2
BS1
BS0
X
X
X
X
X
0
0
0
BS2, BS1, BS0 - Determine the bank presently
in use.
This register is always accessible and is used to
select the register bank in use.
The upper byte always reads as 33h and can be
used to help determine the I/O location of the
LAN91C94.
The BANK SELECT REGISTER is always
accessible regardless of the value of BS0-2.
The LAN91C94 implements only 4 banks,
therefore
accesses
to
non-existing
banks
(BS2=1) are ignored. BS1 and BS0 determine
the bank presently in use.
BS2
BS1
BS0
BANK#
0
0
0
0
1
0
0
1
1
X
0
1
0
1
X
0
1
2
3
None



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