_dwt_enableclock() issue

Wireless Connectivity Ultra-Wideband
1

Hi all,
I tried to run dwt_initalise() and found that i cannot write value 01 to Register PMSC_ID (0x36), when i run dwt_writetodevice(0x36, 0, 1, &reg[0]); with reg[0] like 0x00 or 0x03 everything is ok.
But dwt_writetodevice(0x36, 0, 1, &reg[0]); with reg[0] like 0x01 kills UWB chip. also i became only 0xFF after that.
Is something wrong with my SPI?