CLOCK Electrical specification
High frequency clock source (HFCLK)
| Symbol | Description | Min. | Typ. | Max. | Units |
|---|---|---|---|---|---|
| fNOM | Nominal output frequency | 64/128 | MHz | ||
| fTOL_HFINT | Frequency tolerance when running from internal oscillator | -10 | 6 | % | |
| tSTART_HFINT | Startup time for internal RC oscillator | 6 | μs |
32.768 kHz clock source (LFCLK)
| Symbol | Description | Min. | Typ. | Max. | Units |
|---|---|---|---|---|---|
| fNOM_LFCLK | Nominal output frequency | 32.768 | kHz | ||
| tSTART_LFXO | Startup time for 32.768 kHz crystal oscillator | 0.43 | s | ||
| fTOL_LFRC | Frequency tolerance, uncalibrated | ±4.5 | % | ||
| fTOL_CAL_LFRC | Frequency tolerance after calibration. Constant temperature within ±0.5 °C, calibration performed at least every 8 seconds, averaging interval > 7.5 ms, defined as 3 sigma. | ±250 | ppm | ||
| tSTART_LFRC | Startup time for internal RC oscillator | 1000 | μs |