w83c554f Winbond Electronics Corp America, w83c554f Datasheet - Page 13

• Manufacturer Part Number: w83c554f
• Description: System I/o Controller With Pci Arbiter & Ultradma/33 Ide Controller
• Manufacturer: Winbond Electronics Corp America

W83C554F
This section describes the location and function of each pin on the W83C554F. Note the following conventions used in the
tables:
Buffer type
I
O
I/O
OD
I/OD
VDD
VSS
WINBOND ELECTRONICS CORP. AMERICA
2.2
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Pin Descriptions s
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.
Description
input only signal
output only signal
bi-directional, input/output signal
open drain
input/open drain output is a standard input buffer with open drain output
indicates that the pin should be connected to a +5V power supply
indicates that the pin should be connected to the ground plane.
Pin Descriptions
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