> Unfortunately not... for external input, FOSC<2:0> is 010 It looked possible. No doubt you've gone through the d/s more thoroughly than my casual glance. Joe 6.2.1.1 EC mode has three power modes to select from through Configuration Words: .. High power, 4-32 MHz (FOSC =3D 111) .. Medium power, 0.5-4 MHz (FOSC =3D 110) .. Low power, 0-0.5 MHz (FOSC =3D 101) 6.2.1.4 4x PLL The oscillator module contains a 4x PLL that can be used with both external and internal clock sources to provide a system clock source. The Electrical Specifications appear to disagree with the previously stated '32MHz' TABLE 31-1: CLOCK OSCILLATOR TIMING REQUIREMENTS DC - 20 MHz EC Oscillator mode (high) Only in TABLE 31-3: PLL CLOCK TIMING SPECIFICATIONS is there mention of 32MHz, but I could probably be skipping detail again Usually I start hmmming when the d/s isn't consistent ----- No virus found in this message. Checked by AVG - www.avg.com Version: 2015.0.5863 / Virus Database: 4321/9474 - Release Date: 04/06/15 --=20 http://www.piclist.com/techref/piclist PIC/SX FAQ & list archive View/change your membership options at http://mailman.mit.edu/mailman/listinfo/piclist .