PIC1662, PIC1663, PIC1673 MicroChip PIC microcontrollers. +----------+ /RST |1 +--+ 28| RB7 RA0 |2 27| RB6 RA1 |3 26| RB5 RA2 |4 25| RB4 RA3 |5 24| RB3 RA4 |6 PIC 23| RB2 RA5 |7 16C62 22| RB1 GND |8 16C63 21| RB0 X1 |9 16C73 20| VCC X0 |10 19| GND RC0 |11 18| RC7 RC1 |12 17| RC6 RC2 |13 16| RC5 RC3 |14 15| RC4 +----------+ [This information is part of the GIICM]