I'm trying to generate a clean 11.289MHz clock signal from the General Purpose clock, GPCLK0 on GPIO4. The suggested route is to use the 19.2MHz crystal as the source, which seems to work for lower frequencies but no matter what I try it default to 2.5KHz. Reading the docs it seems to imply the that PPL sources should be used.
Does anyone have any further information on what the mentioned sources are particularly:
- 4 = PLLA per
- 5 = PLLC per
- 6 = PLLD per
See page 107 - Clock Control Register of the BCM2835 Peripheral Documentation.