8-bit CMOS Microcontroller
DIP8
+---\/---+
Vdd | 1 40| Vss
GP5/OSC1/CLKIN | 2 39| GP0
GP4/OSC2 | 3 38| GP1
GP3/*MCLR/Vpp | 4 37| GP2/T0CKI
+--------+
DIP8
Set reader to FREQ, put black probe to GND, red probe to 2 and 3 to measure CPU clock