The description (p452, Table 6-26, bit 0) of TRM SWCU117H says below:
SCLK_HF_SRC_SEL
XOSC option is supported for test and debug only and should be used when the XOSC_HF is running.
0h = High frequency RCOSC clock
1h = High frequency XOSC clk
I think that the configuration "SCLK_HF_SRC_SEL = 1" is NOT for test and debug only actually and can be used for a normal operation.
Is that right?
Best Regards,
Satoshi Shinohara