w89c926 Winbond Electronics Corp America, w89c926 Datasheet - Page 3

• Manufacturer Part Number: w89c926
• Description: Pcmcia Ethernet Network Twisted Pair Interface Controller
• Manufacturer: Winbond Electronics Corp America

PIN DESCRIPTION
PCMCIA Bus Interface
HA0-2
HA3, 4
HA5-7
HA8-10
HA11-13
HA14-16
HD0-2
HD3-5
HD6-8
HD9-11
HD12-15
IREQ
IORD
IOWR
WE
NAME
9, 10, 12
15, 18
20-22
30, 32, 37
34, 23,29
28, 24, 25
8, 6, 2
50, 49, 47
44, 41, 7
4, 1, 48
46, 42, 40, 38
NUMBER
26
33
31
27
IO/3SH
O/TTL
TYPE
I/TTL
I/TTL
I/TTL
I/TTL
Host Address Bus:
Host address lines used to decode access to the card's
memory and I/O spaces.
Host Data Bus:
Bidirectional host data bus.
Interrupt Request:
IREQ is asserted by the PENTIC+ to request host
service. During auto-loading, which is caused by a H/W
reset, IREQ will assert low until auto-loading is
complete. This signaling is used as Rdy/-Bsy of
Memory Only Interface during initialization, according to
PCMCIA R2.1.
I/O Read:
IORD is asserted by the system to read data from the
card's I/O space. It has an internal 100K ohm pull-high
resistor.
I/O Write:
IOWR is asserted by the system to write data to the
card's I/O space. It has an internal 100K ohm pull-high
resistor.
Write Enable:
The WE input is asserted by the system to strobe
memory write data into the card memory. It has an
internal 100K ohm pull-high resistor.
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Publication Release Date: January 1996
DESCRIPTION
W89C926 PENTIC+
Revision A1