Auto-calibration of the PIC12F6XX Internal RC Oscillator to ± 1%

ByStefan

Jun 5, 2011 #application note, #Auto-calibration, #PIC12F6XX

Author: Mike Rylee
Microchip Technology Inc.

INTRODUCTION
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 applications:
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 haveintelligent on-board recalibration.