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NuMicro® NUC029LEE/NUC029SEE
32-bit Arm
®
Cortex
®
-M0 Microcontroller
Aug, 2018
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6.17 Analog-to-Digital Converter (ADC)
6.17.1 Overview
The NuMicro
®
NUC029LEE/NUC029SEE contains one 12-bit successive approximation analog-
to-digital converters (SAR A/D converter) with 12 input channels. The A/D converter supports
three operation modes: single, single-cycle scan and continuous scan mode. The A/D converter
can be started by software, PWM Center-aligned trigger and external STADC pin.
6.17.2 Features
A
nalog input voltage range: 0~V
REF
12-bit resolution and 10-bit accuracy is guaranteed
Up to 12 single-end analog input channels or 5 differential analog input channels
Up to 1 MSPS conversion rate (chip working at 5V)
Three operating modes
-
Single mode: A/D conversion is performed one time on a specified channel
-
Single-cycle scan mode: A/D conversion is performed one cycle on all specified
channels with the sequence from the smallest numbered channel to the largest
numbered channel
-
Continuous scan mode: A/D converter continuously performs Single-cycle scan
mode until software stops A/D conversion
An A/D conversion can be started by:
-
Writing 1 to ADST bit (ADCR[11])through software
-
PWM Center-aligned trigger
-
External pin STADC
Conversion results are held in data registers for each channel with valid and overrun
indicators
Supports two set digital comparators. The conversion result can be compared with
specify value and user can select whether to generate an interrupt when conversion
result matches the compare register setting
Channel 7 supports 3 input sources: external analog voltage, internal Band-gap
voltage, and internal temperature sensor output