Part Number: TMS320F280049
Concerning the XTALCR SHW bit:
The TRM describes the XTALCR register SWH bit as 0: for 2 to 10MHz operation, 1: for 10 to 25MHz operation.
Since the F280049 device can operate with single ended XTAL up to 100MHz, it is assumed that one of the following is true:
A) XTALCR.SWH applies only when XTALCR.SW is 0 (in crystal mode) and SWH=1 should be 10-20MHz?
B) XTALCR.SWH = 1 should be for 10MHz to 100MHz.
For now, if using singled ended >25MHz, will just set SWH =1 (either it is a don't care or range should be 10-100MHz). The 25MHz doesn't match the max 20MHz external crystal or the max 20MHz for single ended with PLL enabled. So this is a documentation clarification request.