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P8255A 其他数据使用手册 - AMD（超微半导体）
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P8255A数据手册
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REI Datasheet
© 2013 Rochester Electronics, LLC. All Rights Reserved 07112013
The Intel 8255A is a general purpose programmable I/O device designed for use with Intel
microprocessors. It has 24 I/O pins which may be individually programmed in 2 groups of 12 and used in
3 major modes of operation. In the rst mode (MODE 0), each group of 12 I/O pins may be programmed
in sets of 4 to be input or output. In MODE 1, the second mode, each group may be programmed to
have 8 lines of input or output. Of the remaining 4 pins, 3 are used for handshaking and interrupt control
signals. The third mode of operation (MODE 2) is a bidirectional bus mode which uses 8 lines for a
bidirectional bus, and 5 lines, borrowing one from the other group, for handshaking.
8255A, 8255A-5
Programmable Peripheral Interface
The original manufacturer’s datasheet accompanying this document reects the performance
and specications of the Rochester manufactured version of this device. Rochester Electronics
guarantees the performance of its semiconductor products to the original OEM specications.
‘Typical’ values are for reference purposes only. Certain minimum or maximum ratings may be
based on product characterization, design, simulation, or sample testing.
To learn more, please visit www.rocelec.com
Quality Overview
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ISO-9001
AS9120 certication
Qualied Manufacturers List (QML) MIL-PRF-38535
Class Q Military
Class V Space Level
Qualied Suppliers List of Distributors (QSLD)
Rochester is a critical supplier to DLA and
meets all industry and DLA standards.
Rochester Electronics, LLC is committed to supplying
products that satisfy customer expectations for
quality and are equal to those originally supplied by
industry manufacturers.
Rochester Electronics
Manufactured Components
Rochester branded components are
manufactured using either die/wafers
purchased from the original suppliers
or Rochester wafers recreated from the
original IP. All recreations are done with
the approval of the OCM.
Parts are tested using original factory
test programs or Rochester developed
test solutions to guarantee product
meets or exceeds the OCM data sheet.
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