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The I 2 C, bus controlled push-pull general-purpose input/output feature PCA 9538/9539 I/O expanders, integrating push-pull outputs, interrupt, and hardware reset. The 4-, 8-, and 16-bit devices have ...
drives the gate's output to a low level and triggers the interrupt. The interrupt-service routine recognizes the interrupt's source by testing the levels of input pins PA0, PA1, PA4, and PA5 and ...
However, the simple flow chart of Input, process, and output are still used to visualise how the system performs. With mechanical control systems the input is supplied by movement, this is known ...
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