Enum lpc845_pac::wkt::ctrl::CLKSEL_A [−][src]
pub enum CLKSEL_A {
DIVIDED_FRO_CLOCK,
LOW_POWER_CLOCK,
}
Expand description
Select the self wake-up timer clock source. Remark: This bit only has an effect if the SEL_EXTCLK bit is not set.
Value on reset: 0
Variants
0: Divided FRO clock. This clock runs at 750 kHz and provides time-out periods of up to approximately 95 minutes in 1.33 us increments. Remark: This clock is not available in not available in Deep-sleep, power-down, deep power-down modes. Do not select this option if the timer is to be used to wake up from one of these modes.
1: This is the (nominally) 10 kHz clock and provides time-out periods of up to approximately 119 hours in 100 us increments. The accuracy of this clock is limited to +/- 40 % over temperature and processing. Remark: This clock is available in all power modes. Prior to use, the low-power oscillator must be enabled. The oscillator must also be set to remain active in Deep power-down if needed.