PIC16 Microcontrollers, Unit 11, Ch. 3; Parallel Input Port Read Timing_low

Parallel ports, power supply
and the clock oscillator
in this video we will explain:
::: Why we need parallel input/output.
How simple logic circuits can be developed to give a flexible interface between the
microcontroller data bus and the outside world – these are the parallel ports.
How external devices can be connected to the parallel port.
The parallel input/output available on the PIC 16F84A.