Saturday, February 4, 2012
USING BRAIN TAPS
REGULATE Propeller Clocks Using TAPS
Propeller chips each have a PLL Phase Locked Loop. It's used to "wind up" the external clock source. The taps are located at 1x, 2x, 4x, 8x and 16x. To use a tap, select the program instruction, for example a 16x tap with a 5MHz crystal will result in a Propeller running its system clock at 80MHz. Remember, using crystals will add an extra part to each chip, though increases speed over a single chip with no external crystal.