NRF52810-QFAA-R datasheet(65/483 Pages) NORDIC

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Power and clock management

5.3.5 RAM sections

RAM section power control is used for retention in System OFF mode and for powering down unused

sections in System ON mode.

Each RAM section can power up and down independently in both System ON and System OFF mode. See

chapter Memory on page 15 for more information on RAM sections.

5.3.6 Reset

There are multiple sources that may trigger a reset.

After a reset has occurred, register RESETREAS can be read to determine which source generated the

reset.

5.3.6.1 Power-on reset

The power-on reset generator initializes the system at power-on.

The system is held in reset state until the supply has reached the minimum operating voltage and the

internal voltage regulators have started.

A step increase in supply voltage of 300 mV or more, with rise time of 300 ms or less, within the valid

supply range, may result in a system reset.

5.3.6.2 Pin reset

A pin reset is generated when the physical reset pin on the device is asserted.

Pin reset is configured via the PSELRESET[0] and PSELRESET[1] registers.

Note: Pin reset is not available on all pins.

5.3.6.3 Wakeup from System OFF mode reset

The device is reset when it wakes up from System OFF mode.

The DAP is not reset following a wake up from System OFF mode if the device is in debug interface mode.

Refer to chapter Debug on page 50 for more information.

5.3.6.4 Soft reset

A soft reset is generated when the SYSRESETREQ bit of the Application Interrupt and Reset Control

Refer to ARM documentation for more details.

A soft reset can also be generated via the RESET on page 52 register in the CTRL-AP.

5.3.6.5 Watchdog reset

A Watchdog reset is generated when the watchdog times out.

Refer to chapter WDT — Watchdog timer on page 454 for more information.

5.3.6.6 Brown-out reset

The brown-out reset generator puts the system in reset state if the supply voltage drops below the

brownout reset (BOR) threshold.

Refer to section Power fail comparator on page 83 for more information.

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