lan91c96i Standard Microsystems Corp., lan91c96i Datasheet - Page 34

• Manufacturer Part Number: lan91c96i
• Description: Lan91c96i Non-pci Single-chip Full Duplex Ethernet Controller With Industrial Temperature Range
• Manufacturer: Standard Microsystems Corp.

7.2
7.2.1
Rev. 03-28-07
I/O Space Registers Description
Bank Select Register
BS2, BS1, BS0 - Determine the bank presently in use.
This register is always accessible except in power down mode 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
LAN91C96I.
The BANK SELECT REGISTER is always accessible regardless of the value of BS0-2.
Accesses to non-existing banks will ignore writes and reads will return 0x33 on byte reads.
I/O SPACE - BANK0
This register holds bits programmed by the CPU to control some of the protocol transmit options.
NOCRC - Does not append CRC to transmitted frames when set, allows software to insert the desired
CRC. Defaults to zero, namely CRC inserted.
OFFSET
PAD_EN
FDSE
0
0
0
X
0
0
# IN HEX
OFFSET
ETEN-
TYPE
X
0
TRANSMIT CONTROL REGISTER
0
0
X
BS2
0
0
0
0
1
LOOP
BANK SELECT
EPH
X
0
X
1
1
REGISTER
DATASHEET
NAME
NAME
BS1
SQET
0
0
1
1
X
STP
X
0
X
1
1
Page 34
FDUPLX
TXP_EN
BS0
0
0
X
0
1
0
1
READ/WRITE
X
0
0
TYPE
Non-PCI Single-Chip Full Duplex Ethernet Controller
FORCOL
READ/WRITE
MON_
BANK #
CSN
None
BS2
0
0
0
0
0
0
1
2
3
TYPE
LOOP
BS1
X
0
1
1
0
SYMBOL
BSR
SYMBOL
NOCRC
TXENA
SMSC DS – LAN91C96I
TCR
BS0
0
0
1
1
0