Iotech digital 488 digital i/o converter * *

Iotech digital 488 digital i/o converter * *

IOtech Digital 488 Digital I/O Converter *NIB*
The Digital488 is a digital input and output interface to the IEEE 488 bus. Each unit has 40 TTL level digital I/O lines, which are divided into 5 eight-bit ports. Each port is software programmable as input or output.
The Digital488 has several features which give it versatile interface capability. A trigger output signal is asserted on the Group Execute Trigger (GET) command. Edge-triggered inputs can generate a Service Request on the bus. Six data formats are software program
mable, including ASCII hexadecimal, ASCII character, ASCII binary, binary, high speed binary and ASCII decimal. There are also individual bit set and bit clear commands.
A status mode enables the controller to interrogate the programmed status of the Digital488 at any time. A self-test is initiated as power-on which checks for proper RAM and ROM operation.
When addressed to talk, the Digital 488 will output data from all forty bits or a selected 8 bit port. When addressed to listen, the unit will input data and programming information from the controller, and output the data to the appropriate I/O port.
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