NUC029-FAN datasheet(48/70 Pages) NUVOTON

48 / 70 page

NUC029xDE

Dec 18, 2018

Page 48 of 70

Rev 1.01

6.14 Analog-to-Digital Converter (ADC)

6.14.1 Overview

The NuMicro

® NUC029LDE/NUC029SDE contains one 12-bit successive approximation analog-

to-digital converters (SAR A/D converter) with 8 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 trigger and external STADC pin.

6.14.2 Features



Analog input voltage range: 0~VREF



12-bit resolution and 10-bit accuracy is guaranteed



Up to 8 single-end analog input channels or 4 differential analog input channels



Up to 1000 kSPS 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 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 2 input sources: external analog voltage, and internal Band-gap

voltage

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