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LAN91C94 Datasheet(PDF) 58 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) 58 Page - SMSC Corporation

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58
I/O SPACE - BANK2
OFFSET
C
NAME
INTERRUPT STATUS REGISTER
TYPE
READ ONLY
SYMBOL
IST
ERCV INT
EPH INT
RX_OVRN
INT
ALLOC
INT
TX EMPTY
INT
TX INT
RCV INT
X
0
0
0
0
1
0
0
OFFSET
C
NAME
INTERRUPT ACKNOWLEDGE
REGISTER
TYPE
WRITE ONLY
SYMBOL
ACK
ERCV INT
RX_OVRN
INT
TX EMPTY
INT
TX INT
OFFSET
D
NAME
INTERRUPT MASK REGISTER
TYPE
READ/WRITE
SYMBOL
MSK
ERCV INT
EPH INT
RX_OVRN
INT
ALLOC
INT
TX EMPTY
INT
TX INT
RCV INT
X
0
0
0
0
0
0
0
This register can be read and written as a word
or as two individual bytes.
The Interrupt Mask Register bits enable the
appropriate bits when high and disable them
when low. An enabled bit being set will cause a
hardware interrupt.
EPH INT - Set when the Ethernet Protocol
Handler section indicates one out of various
possible special conditions. This bit merges
exception type of interrupt sources, whose
service time is not critical to the execution speed
of the low level drivers. The exact nature of the
interrupt can be obtained from the EPH



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