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• 48 TTL digital I/O lines• Emulates mode 0 of 8255 PPI (every port with nibble)• Supports both dry and wet contact• Interrupt handling capability• Timer/Counter interrupt capability• Buffered circuits for higher driving capacity than the 8255• Keeps the I/O port setting and DO state after system reset• BoardID switch• Pattern match interrupt function for DI• Change of state interrupt function for DI• Programmable digital filter function for DI
