详细规格及用途描述

The DIO-4264 card is a FPGA based
design that gives the maximum flexibility
of implementation. It has 48 point
82C55 mode 0 compatible I/Os with
extendable driving capacity (adopt
74HC245 as buffer). Not only the
emulate the basic function of 82C55, we
also provide 16 extra nibble
programmable I/O for your best
performance/cost result. For the most
convenience of the user the connectors are OPT022 compatible and the circuit
diagram of the card also provided.