NRF9160-SICA-R7 datasheet(355/400 Pages) NORDIC

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Peripherals

6.20.2 Temporarily pausing the watchdog

By default, the watchdog will be active counting down the down-counter while the CPU is sleeping and

when it is halted by the debugger. It is however possible to configure the watchdog to automatically pause

while the CPU is sleeping as well as when it is halted by the debugger.

6.20.3 Watchdog reset

A TIMEOUT event will automatically lead to a watchdog reset.

See Reset on page 56 for more information about reset sources. If the watchdog is configured to generate

an interrupt on the TIMEOUT event, the watchdog reset will be postponed with two 32.768 kHz clock

cycles after the TIMEOUT event has been generated. Once the TIMEOUT event has been generated, the

impending watchdog reset will always be effectuated.

The watchdog must be configured before it is started. After it is started, the watchdog’s configuration

registers, which comprise registers CRV, RREN, and CONFIG, will be blocked for further configuration.

The watchdog can be reset from several reset sources, see Reset behavior on page 57.

When the device starts running again, after a reset, or waking up from OFF mode, the watchdog

configuration registers will be available for configuration again.

6.20.4 Registers

Base address Peripheral

Instance

Secure mapping

DMA security

Description

Configuration

0x50018000

0x40018000

WDT

WDT : S

WDT : NS

Watchdog timer

Table 101: Instances

Offset

Security Description

TASKS_START

0x000

Start the watchdog

SUBSCRIBE_START

0x080

Subscribe configuration for task START

EVENTS_TIMEOUT

0x100

Watchdog timeout

PUBLISH_TIMEOUT

0x180

Publish configuration for event TIMEOUT

INTENSET

0x304

Enable interrupt

INTENCLR

0x308

Disable interrupt

RUNSTATUS

0x400

Run status

REQSTATUS

0x404

Request status

CRV

0x504

Counter reload value

RREN

0x508

Enable register for reload request registers

CONFIG

0x50C

Configuration register

RR[n]

0x600

Reload request n

Table 102: Register overview

6.20.4.1 TASKS_START

Address offset: 0x000

Start the watchdog

4418_1315 v2.0

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