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UPD8255A-5 - PROGRAMMABLE PERIPHERAL INTERFACES

Download the UPD8255A-5 datasheet PDF. This datasheet also covers the UPD8255 variant, as both devices belong to the same programmable peripheral interfaces family and are provided as variant models within a single manufacturer datasheet.

Description

The 3-state, bidirectional, eight bit Data Bus Buffer (DO-D71 of the .uPD8255 and .uPD8255A-5 can be directly interfaced to the processor's system Data Bus (DO-D7)The Data Bus Buffer is controlled by execution of IN and OUT instructions by the processor.

Features

  • unique to each of the ports. Port A = An 8-bit data output latch/buffer and data input latch. Port B = An 8-bit data input/output latch/buffer and an 8-bit data input buffer.

📥 Download Datasheet

Note: The manufacturer provides a single datasheet file (UPD8255-NEC.pdf) that lists specifications for multiple related part numbers.

Datasheet Details

Part number UPD8255A-5
Manufacturer NEC
File Size 374.28 KB
Description PROGRAMMABLE PERIPHERAL INTERFACES
Datasheet download datasheet UPD8255A-5 Datasheet

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Other Datasheets by NEC

Part Number Description
UPD8255A Programmable Peripheral Interface
UPD8255 PROGRAMMABLE PERIPHERAL INTERFACES
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UPD8251A PROGRAMMABLE COMMUNICATIONS INTERFACE
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Full PDF Text Transcription (Reference)

The following content is an automatically extracted verbatim text from the original manufacturer datasheet and is provided for reference purposes only.

View original datasheet text
NEe Microcomputers, Inc. NE'C fLPD8255 fLPD8255A·5 PROGRAMMABLE PERIPHERAL INTERFACES D ESCR I PTI ON The IlPD8255 and IlPD8255A-5 are general purpose programmable INPUT/OUTPUT devices designed for use with the 8080A/8085A microprocessors. Twenty-four (24) I/O lines may be programmed in two groups of twelve (group I and group II) and used in three modes of operation. In the Basic mode, (MODE 0), each group of twelve I/O pins may be programmed in sets of 4 to be iniJut or output. In the Strobed mode, (MODE 1), each group may be programmed to have 8 lines of input or output. Three of the remaining four pins in each group are used for handshaking strobes and interrupt control signals.
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