Erik Walthinsen wrote:
In theory you can use the 48MHz clock divided by 2 to drive the CPU at
24Mhz, but there's no way to get 32Mhz out of the USB SOF+DFLL ;-(
Also, the 2Mhz DFLL can *only* be driven from internal or external
32.768KHz, which means you can't use the SOF to calibrate the CPU clock as
driven by the 2MHz * PLL.
OK, this doesn't contradict anything I wrote and I don't think the OP wanted
the CPU clock synchronized to SoF, so I'm not sure where you're taking us
with this additional information.
Graham.
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