PIC16F628A

                 _________    _________
               _|         \__/         |_
      <-> RA2 |_|1                   18|_| RA1  <->
               _|                      |_
      <-> RA3 |_|2                   17|_| RA0  <->
               _|                      |_
      <-> RA4 |_|3     PIC16F628A    16|_| RA7/OSC1/CLKIN <->
               _|                      |_
 --> RA5/MCLR |_|4                   15|_| RA6/OSC2/CLKOUT <->
               _|                      |_
  --> VSS/GND |_|5                   14|_| VDD/VCC <--
               _|                      |_
     <-> RB0  |_|6                   13|_| RB7 <->
               _|                      |_
     <-> RB1  |_|7                   12|_| RB6 <->
               _|                      |_
     <-> RB2  |_|8                   11|_| RB5 <->
               _|                      |_
     <-> RB3  |_|9                   10|_| RB4 <->
                |______________________|