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annotate voltage regulation erratum

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Alex Maestas 2024-01-22 00:31:27 +00:00
parent 2ae8f9863b
commit af49d3cfcb
1 changed files with 3 additions and 1 deletions
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4
watch-library/hardware/watch/watch_private.c
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@ -35,7 +35,9 @@ void _watch_init(void) {
// Use switching regulator for lower power consumption. // Use switching regulator for lower power consumption.
SUPC->VREG.bit.SEL = 1; SUPC->VREG.bit.SEL = 1;
// work around a silicon erratum that causes the microcontroller to lock up on leaving standby:
// per Microchip datasheet clarification DS80000782,
// work around silicon erratum 1.7.2, which causes the microcontroller to lock up on leaving standby:
// request that the voltage regulator run in standby, and also that it switch to PL0. // request that the voltage regulator run in standby, and also that it switch to PL0.
SUPC->VREG.bit.RUNSTDBY = 1; SUPC->VREG.bit.RUNSTDBY = 1;
SUPC->VREG.bit.STDBYPL0 = 1; SUPC->VREG.bit.STDBYPL0 = 1;