w89c926 Winbond Electronics Corp America, w89c926 Datasheet - Page 4

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

Pin Description, continued
OE
CE1 ,2
REG
IOIS16
INPACK
RESET
WAIT
NAME
NUMBER
39, 36
100
35
11
13
17
19
O/TTL
O/TTL
O/TTL
TYPE
I/TTL
I/TTL
I/TTL
I/TTL
Output Enable:
The OE line is asserted by the system to obtain
memory read data from the card memory. It has an
internal 100K ohm pull-high resistor.
Card Enable:
control as shown below. These pins have an internal
100K ohm pull-high resistor.
Register & I/O selection:
REG is asserted by the system to access attribute
memory or I/O space. It remains high inactive for
common memory accesses. It has an internal 100K ohm
pull-high resistor.
16-bit I/O access:
Asserted by the PENTIC+ to inform the system that
current operation is a 16-bit I/O access.
Input Acknowledge:
Asserted by the PENTIC+ when it has been selected
and can respond to an I/O read cycle.
Wait State:
Asserted by the PENTIC+ to insert wait states into
current memory or I/O access cycles.
Card Reset:
A RESET pulse will initiate the PENTIC+'s initialization
procedure, including auto-ID/configuration loading,
register initialization, and state machine initialization.
The pulse width should be at least 500 nS to be
recognized as a valid reset. This pin has an internal
100K ohm pull-up resistor.
CE1 ,2 are asserted by the system for data bus width
CE2
- 4 -
0
1
1
0
CE
0
1
0
1
HD15-HD8
DESCRIPTION
W89C926 PENTIC+
High-Z
High-Z
Valid
Valid
HD7-HD0
Valid
Valid
High-Z
High-Z