(Hong Kong)
Product Summary
The D8255AC-2 is a programmable peripheral interface. The D8255AC-2 is general purpose programmable input/output devices designed for use with the 8080A/8085A microprocessors. Twenty-four 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 input 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. The bidirectional bus mode, (MODE 2), uses the 8 lines of port A for a bi-directional bus, and five lines from port C for bus control signals.
Parametrics
D8255AC-2 absolute maximum ratings: (1)Operating temperature: 0℃ to +70℃; (2)Storage temperature: -65℃ to +150℃; (3)Voltage on any pin with respect to vss: -0.5to+7V.
Features
D8255AC-2 features: (1)Fully compatible with the 8080Al8085 microprocessor families; (2)All inputs and outputs TIL compatible; (3)24 programmable I/O pins; (4)Direct bit set/reset eases control application interfaces; (5)Eight Darlington drive outputs for printers and displays; (6)LSI drastically reduces system package count.
Diagrams
