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NRF52820-QDAA-R Datasheet(PDF) 68 Page - Nordic Semiconductor |
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NRF52820-QDAA-R Datasheet(HTML) 68 Page - Nordic Semiconductor |
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68 / 437 page  Power and clock management 5.3.8.3 Device startup times Symbol Description Min. Typ. Max. Units tPOR Time in power-on reset after supply reaches minimum operating voltage, depending on supply rise time tPOR,10µs VDD rise time 10 µs9 1 10 ms tPOR,10ms VDD rise time 10 ms9 9 ms tPOR,60ms VDD rise time 60 ms9 23 110 ms tRISE,REG0OUT REG0 output (VDD) rise time after VDDH reaches minimum VDDH supply voltage9 tRISE,REG0OUT,10µs VDDH rise time 10 µs9 0.22 1.55 ms tRISE,REG0OUT,10ms VDDH rise time 10 ms9 5 ms tRISE,REG0OUT,100ms VDDH rise time 100 ms9 30 50 80 ms tPINR Reset time when using pin reset, depending on pin capacitance tPINR,500nF 500 nF capacitance at reset pin 32.5 ms tPINR,10µF 10 µF capacitance at reset pin 650 ms tR2ON Time from power-on reset to System ON tR2ON,NOTCONF If reset pin not configured tPOR ms tR2ON,CONF If reset pin configured tPOR + tPINR ms tOFF2ON Time from OFF to CPU execute 16.5 µs tIDLE2CPU Time from IDLE to CPU execute 3.0 µs tEVTSET,CL1 Time from HW event to PPI event in Constant Latency System ON mode 0.0625 µs tEVTSET,CL0 Time from HW event to PPI event in Low Power System ON mode 0.0625 µs 5.3.8.4 Power fail comparator Symbol Description Min. Typ. Max. Units VPOF,NV Nominal power level warning thresholds (falling supply voltage) in Normal voltage mode (supply on VDD). Levels are configurable between Min. and Max. in 100 mV increments 1.7 2.8 V VPOF,HV Nominal power level warning thresholds (falling supply voltage) in High voltage mode (supply on VDDH). Levels are configurable in 100 mV increments 2.7 4.2 V VPOFTOL Threshold voltage tolerance (applies in both Normal voltage mode and High voltage mode) -5 5 % VPOFHYST Threshold voltage hysteresis (applies in both Normal voltage mode and High voltage mode) 40 50 60 mV VBOR,OFF Brownout reset voltage range System OFF mode. Brownout only applies to the voltage on VDD 1.2 1.62 V VBOR,ON Brownout reset voltage range System ON mode. Brownout only applies to the voltage on VDD 1.57 1.6 1.63 V 9 See Recommended operating conditions on page 430 for more information. 4463_156 v1.0 68 |
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