Computer/Embedded Technology


Digital I/O and counter card

9 April 2003 Computer/Embedded Technology

An add-on PC compatible, digital I/O and counter card with 32 digital input channels, 32 digital output channels and three programmable counter/timer channels is available from ProMicro.

The digital I/O channels on the PCL-720 are TTL-compatible and use 74LS244 driver/buffer circuits to provide a high output driving capacity. These buffered circuits also require a lower input loading current than regular TTL circuits.

Its 8254 programmable counter/timer provides three flexible 16-bit counter/timer channels. Waves and pulses can be generated by programming the 8254 and a breadboard area is available for customised circuits.



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