This application note describes a technique used to
calibrate the internal oscillator on the PIC12F6XX
devices. This technique allows the internal oscillator to
be calibrated within ± 1%. See the test circuit shown in
Figure 1.
This application note is useful in the following applica-
tions:
1. High volume production environment.
2. Battery applications using on-board calibration
to recalibrate the internal RC oscillator as the
battery voltage drops.
3. Applications that are exposed to a varying
voltage and temperature range could have
intelligent on-board recalibration. AN250
Auto-calibration of the PIC12F6XX Internal RC Oscillator to ± 1%
THEORY OF OPERATION
Author: Mike Rylee
Microchip Technology Inc. Equipment Used
HP54645D Oscilloscope with digital probes
AGILENT 33120A Function Generator
INTRODUCTION
HPE3620A Power Supply
This application note describes a technique used to Digital multimeter with frequency count……
