LFXOMODE=XTAL, CLKOUTSEL0=HFRCO, HFXOTIMEOUT=8CYCLES, LFXOTIMEOUT=8CYCLES, HFXOBOOST=50PCENT, HFXOMODE=XTAL
CMU Control Register
| HFXOMODE | HFXO Mode 0 (XTAL): 4-32 MHz crystal oscillator. 1 (BUFEXTCLK): An AC coupled buffer is coupled in series with HFXTAL_N, suitable for external sine wave (4-32 MHz). The sine wave should have a minimum of 200 mV peak to peak. 2 (DIGEXTCLK): Digital external clock on HFXTAL_N pin. Oscillator is effectively bypassed. |
| HFXOBOOST | HFXO Start-up Boost Current 0 (50PCENT): 50 %. 1 (70PCENT): 70 %. 2 (80PCENT): 80 %. 3 (100PCENT): 100 % (default). |
| HFXOBUFCUR | HFXO Boost Buffer Current |
| HFXOGLITCHDETEN | HFXO Glitch Detector Enable |
| HFXOTIMEOUT | HFXO Timeout 0 (8CYCLES): Timeout period of 8 cycles. 1 (256CYCLES): Timeout period of 256 cycles. 2 (1KCYCLES): Timeout period of 1024 cycles. 3 (16KCYCLES): Timeout period of 16384 cycles. |
| LFXOMODE | LFXO Mode 0 (XTAL): 32.768 kHz crystal oscillator. 1 (BUFEXTCLK): An AC coupled buffer is coupled in series with LFXTAL_N pin, suitable for external sinus wave (32.768 kHz). 2 (DIGEXTCLK): Digital external clock on LFXTAL_N pin. Oscillator is effectively bypassed. |
| LFXOBOOST | LFXO Start-up Boost Current |
| LFXOBUFCUR | LFXO Boost Buffer Current |
| LFXOTIMEOUT | LFXO Timeout 0 (8CYCLES): Timeout period of 8 cycles. 1 (1KCYCLES): Timeout period of 1024 cycles. 2 (16KCYCLES): Timeout period of 16384 cycles. 3 (32KCYCLES): Timeout period of 32768 cycles. |
| CLKOUTSEL0 | Clock Output Select 0 0 (HFRCO): HFRCO (directly from oscillator). 1 (HFXO): HFXO (directly from oscillator). 2 (HFCLK2): HFCLK/2. 3 (HFCLK4): HFCLK/4. 4 (HFCLK8): HFCLK/8. 5 (HFCLK16): HFCLK/16. 6 (ULFRCO): ULFRCO (directly from oscillator). |
| CLKOUTSEL1 | Clock Output Select 1 |