NRF52811-QCAA-R datasheet(259/444 Pages) NORDIC

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Peripherals

6.16.10.15 CC[n] (n=0..3)

Address offset: 0x540 + (n × 0x4)

Compare register n

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

A A A A A A A A A A A A A A A A A A A A A A A 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

Access

Field

Value ID

Value

Description

RW COMPARE

Compare value

6.16.11 Electrical specification

6.17 SAADC — Successive approximation analog-to-

digital converter

The ADC is a differential successive approximation register (SAR) analog-to-digital converter.

Listed here are the main features of SAADC:

• 8/10/12-bit resolution, 14-bit resolution with oversampling

• Up to eight input channels

• One channel per single-ended input and two channels per differential input

• Scan mode can be configured with both single-ended channels and differential channels.

• Full scale input range (0 to VDD)

• Sampling triggered via a task from software or a PPI channel for full flexibility on sample frequency

source from low power 32.768kHz RTC or more accurate 1/16MHz Timers

• One-shot conversion mode to sample a single channel

• Scan mode to sample a series of channels in sequence. Sample delay between channels is tack + tconv

which may vary between channels according to user configuration of tack.

• Support for direct sample transfer to RAM using EasyDMA

• Interrupts on single sample and full buffer events

• Samples stored as 16-bit 2’s complement values for differential and single-ended sampling

• Continuous sampling without the need of an external timer

• Internal resistor string

• Limit checking on the fly

6.17.1 Shared resources

The ADC can coexist with COMP and other peripherals using one of

AIN0-AIN7, provided these are

assigned to different pins.

It is not recommended to select the same analog input pin for both modules.

6.17.2 Overview

The ADC supports up to eight external analog input channels, depending on package variant. It can be

operated in a one-shot mode with sampling under software control, or a continuous conversion mode

with a programmable sampling rate.

The analog inputs can be configured as eight single-ended inputs, four differential inputs or a combination

of these. Each channel can be configured to select

AIN0 to AIN7 pins, or the VDD pin. Channels can be

4454_140 v1.0

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