Perhaps Synth PU stands for Synthetic Power Up?

1. If the RadioID Radio Version isn't 0x2050 or the Radio Revision is 6 or higher, return, we don't need the work around

2. If the channel passed in is 10 or less, the workaround channel is the channel + 4
3. Otherwise, the workaround channel is 1

4. Write the frequency of the workaround channel - 2400 to MMIO offset 0x3F0

5. Delay for 100uSec

6. Write the frequency of the passed in channel - 2400 to MMIO offset 0x3F0