Clock Mode Setting Constant1
XO Resistance2
XI/XO Capacitance2
Description
Infinite
n/a
Internal fast oscillator (~12 MHz). May be 8 MHz to 20 MHz. (Default)
Internal slow oscillator (~20 kHz). May be 13 kHz to 33 KHz.
6 pF (pad only)
External clock-oscillator (DC to 80 MHz); XI pin only, XO disconnected
2 kΩ
36 pF
External low-speed crystal (4 MHz to 16 MHz)
1 kΩ
26 pF
External medium-speed crystal (8 MHz to 32 MHz)
500 Ω
16 pF
External high-speed crystal (20 MHz to 80 MHz)
Multiply external frequency times 1
Multiply external frequency times 2
Multiply external frequency times 4
Multiply external frequency times 8
Multiply external frequency times 16
Note 1: All constants are also available in Propeller Assembly
Note 2: All necessary resistors/capacitors are included in the Propeller Chip
Propeller Help Version 1.1
Copyright © Parallax Inc.
5/13/2009