HFCLKSTAT

nRF5340 Product Specification

Address offset: 0x40C

Status indicating which HFCLK128M/HFCLK64M source is running

This register value in any CLOCK instance reflects status only due to configurations/actions in that CLOCK instance.

Bit number 31 30 29 28 27 26 25 24 23 22 21 20 19 18 17 16 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0
ID C B A
Reset 0x00000000 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
ID R/W Field Value ID Value Description
A

R

SRC

Active clock source

HFINT

0

Clock source: HFINT - 128 MHz on-chip oscillator

HFXO

1

Clock source: HFXO - 128 MHz clock derived from external 32 MHz crystal oscillator

B

R

ALWAYSRUNNING

ALWAYSRUN activated

NotRunning

0

Automatic clock control enabled

Running

1

Oscillator is always running

C

R

STATE

HFCLK state

NotRunning

0

HFCLK not running

Running

1

HFCLK running