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전자부품 데이터시트 검색엔진 |
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전자부품 데이터시트 검색엔진 |
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W83C554F 데이터시트(PDF) 13 Page - Winbond |
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W83C554F 데이터시트(HTML) 13 Page - Winbond |
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13 / 156 page  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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