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W83C554F Datasheet(PDF) 13 Page - Winbond

Part # W83C554F
Description  SYSTEM I/O CONTROLLER WITH PCI ARBITER & UltraDMA/33 IDE Controller
PDF  156 Pages
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Manufacturer  WINBOND [Winbond]
Direct Link  http://www.winbond.com
Logo WINBOND - Winbond

W83C554F Datasheet(HTML) 13 Page - Winbond

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W83C554F
Pin Descriptions
WINBOND ELECTRONICS CORP. AMERICA
11
2.2
Pin Descriptions
s
This section describes the location and function of each pin on the W83C554F. Note the following conventions used in the
tables:
•
Where more than one pin is listed for a signal, the first pin number corresponds to the most significant
bit of the bus. For example, the Bus Command and Byte Enables bits 3 to 0 (C/BE[3:0]#) use pins 1,
12, 22, and 31.
•
The "#" symbol at the end of a signal name => active state (or asserted state) occurs when the signal is
at a low voltage level.
•
Some pins, when pulled high or pulled low with an external resistor (also called strap), will change the
behavior of the chip. These pins are typed with bold font.
Buffer type
Description
I
input only signal
O
output only signal
I/O
bi-directional, input/output signal
OD
open drain
I/OD
input/open drain output is a standard input buffer with open drain output
VDD
indicates that the pin should be connected to a +5V power supply
VSS
indicates that the pin should be connected to the ground plane.



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