I am using the USB on the bf547M blackfin for attaching a HID device. I have a 24 MHz oscillator hooked up to USB_XI pin.
I have several keyboards that work, but I have one keyboard that does not and I keep getting a frame timing jitter error.
When messing with the clocking I noticed that the PLL_STABLE bit in the USB_PLLOSC_CTRL register never gets
set to 1. Does this bit work? I know this could mean that the PLL cannot lock to my 24MHz input clock.
I have another board setup here that has a 19.2MHz input clock from a very accurate oscillator.
This board does the same thing, the PLL_STABLE bit never gets set and all the same
keyboards work or don't work.
Thanks for your time,