Breadboard module for PIC16F628A
Here’s another breadboard module that carries a PIC16F628A microcontroller. The power supply pins and the I/O ports of the PIC16F628A microcontroller are accessed through male headers. It can be easily plugged into a breadboard and is very useful for quick prototyping. It frees up a lot of space on the breadboard since the oscillator, reset, and ICSP circuits are already built on the module. It is different from the previous PIC16F688 breadboard module in the way that the microcontroller now runs with an external 4.0 MHz crystal. So, this module will be more appropriate for experiments that require accurate timing calculations. Besides, the PIC16F628a microcontroller allows you to read/write 8-bit data directly through PORTB, which is 8-bit wide (none of the ports in PIC16F688 were 8-bit wide).
The layout and the circuit diagram of the module is shown below. The module has ICSP header pins for in-circuit programming, a reset switch, and an LED as power-on indicator. It provides easy access to all the pins of PORTB, and RA0 through RA4 pins of PORTA. Pins RA6 and RA7 are used for external crystal connections, whereas RA5 is input only pin and is used for reset circuit.
Component layout