NRF52811-QCAA-R7 datasheet(157/444 Pages) NORDIC

157 / 444 page

Peripherals

The idle state of a pin is defined by the OUT register in the GPIO module, to ensure that the pins used by

the PWM module are driven correctly. If PWM generation is stopped by triggering a STOP task, the PWM

module itself is temporarily disabled or the device temporarily enters System OFF. This configuration must

be retained in the GPIO for the selected pins (I/Os) for as long as the PWM module is supposed to be

connected to an external PWM circuit.

Only one peripheral can be assigned to drive a particular GPIO pin at a time. Failing to do so may result in

unpredictable behavior.

6.12.5 Registers

Base address

Peripheral

Instance

Description

Configuration

0x4001C000

PWM

PWM0

Pulse-width modulation unit 0

Table 53: Instances

Offset

Description

TASKS_STOP

0x004

Stops PWM pulse generation on all channels at the end of current PWM period, and stops

sequence playback

TASKS_SEQSTART[0]

0x008

Loads the first PWM value on all enabled channels from sequence 0, and starts playing

that sequence at the rate defined in SEQ[0]REFRESH and/or DECODER.MODE. Causes PWM

generation to start if not running.

TASKS_SEQSTART[1]

0x00C

Loads the first PWM value on all enabled channels from sequence 1, and starts playing

that sequence at the rate defined in SEQ[1]REFRESH and/or DECODER.MODE. Causes PWM

generation to start if not running.

TASKS_NEXTSTEP

0x010

Steps by one value in the current sequence on all enabled channels if

DECODER.MODE=NextStep. Does not cause PWM generation to start if not running.

EVENTS_STOPPED

0x104

Response to STOP task, emitted when PWM pulses are no longer generated

EVENTS_SEQSTARTED[0]

0x108

First PWM period started on sequence 0

EVENTS_SEQSTARTED[1]

0x10C

First PWM period started on sequence 1

EVENTS_SEQEND[0]

0x110

Emitted at end of every sequence 0, when last value from RAM has been applied to wave

counter

EVENTS_SEQEND[1]

0x114

Emitted at end of every sequence 1, when last value from RAM has been applied to wave

counter

EVENTS_PWMPERIODEND

0x118

Emitted at the end of each PWM period

EVENTS_LOOPSDONE

0x11C

Concatenated sequences have been played the amount of times defined in LOOP.CNT

SHORTS

0x200

Shortcuts between local events and tasks

INTEN

0x300

Enable or disable interrupt

INTENSET

0x304

Enable interrupt

INTENCLR

0x308

Disable interrupt

ENABLE

0x500

PWM module enable register

MODE

0x504

Selects operating mode of the wave counter

COUNTERTOP

0x508

Value up to which the pulse generator counter counts

PRESCALER

0x50C

Configuration for PWM_CLK

DECODER

0x510

Configuration of the decoder

LOOP

0x514

Number of playbacks of a loop

SEQ[0].PTR

0x520

Beginning address in RAM of this sequence

SEQ[0].CNT

0x524

Number of values (duty cycles) in this sequence

SEQ[0].REFRESH

0x528

Number of additional PWM periods between samples loaded into compare register

SEQ[0].ENDDELAY

0x52C

Time added after the sequence

SEQ[1].PTR

0x540

Beginning address in RAM of this sequence

SEQ[1].CNT

0x544

Number of values (duty cycles) in this sequence

SEQ[1].REFRESH

0x548

Number of additional PWM periods between samples loaded into compare register

SEQ[1].ENDDELAY

0x54C

Time added after the sequence

4454_140 v1.0

157

NRF52811-QCAA-R7 Datasheet(PDF) 157 Page - Nordic Semiconductor

NRF52811-QCAA-R7 Datasheet(HTML) 157 Page - Nordic Semiconductor

Html Pages

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 ...More

Datasheet Download

Link URL