Manual
Table Of Contents
- 1 GENERAL DESCRIPTION
- 2 FEATURES
- 3 PARTS INFORMATION LIST AND PIN CONFIGURATION
- 4 BLOCK DIAGRAM
- 5 FUNCTIONAL DESCRIPTION
- 5.1 ARM® Cortex™-M0 core
- 5.2 System Manager
- 5.3 Clock Controller
- 5.4 USB Device Controller
- 5.5 General Purpose I/O
- 5.6 I2C Serial Interface Controller (Master/Slave)
- 5.7 PWM Generator and Capture Timer
- 5.8 Real Time Clock (RTC)
- 5.9 Serial Peripheral Interface (SPI) Controller
- 5.10 Timer Controller
- 5.11 Watchdog Timer
- 5.12 UART Interface Controller
- 5.13 Controller Area Network (CAN Bus)
- 5.14 PS2 Device Controller (PS2D)
- 5.15 I2S Controller
- 5.16 Analog-to-Digital Converter (ADC)
- 5.17 Analog Comparator
- 5.18 PDMA Controller
- 6 FLASH MEMORY CONTROLLER (FMC)
- 7 ELECTRICAL CHARACTERISTICS
- 7.1 Absolute Maximum Ratings
- 7.2 DC Electrical Characteristics
- 7.3 AC Electrical Characteristics
- 7.4 Analog Characteristics
- 7.4.1 Specification of 12-bit SARADC
- 7.4.2 Specification of LDO & Power management
- 7.4.3 Specification of Low Voltage Reset
- 7.4.4 Specification of Brownout Detector
- 7.4.5 Specification of Power-On Reset (5V)
- 7.4.6 Specification of Temperature Sensor
- 7.4.7 Specification of Comparator
- 7.4.8 Specification of USB PHY
- 8 PACKAGE DIMENSIONS
- 9 REVISION HISTORY
NUC140 Series DATA SHEET
Publication Release Date: May 31, 2010
- 52 - Revision V1.02
5.16 Analog-to-Digital Converter (ADC)
5.16.1 Functional Description
NUC1XX series contain 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. There are two kinds of scan mode: continuous mode and
single cycle mode. The A/D converters can be started by software and external STADC/PB.8 pin.
Note that the analog input port pins must be configured as input type before ADC function is enabled.
5.16.2 Features
y Analog input voltage range: 0~Vref (Max to 5.0V).
y 12-bits resolution and 10-bits accuracy is guaranteed.
y Up to 8 single-end analog input channels or 4 differential analog input channels.
y Maximum ADC clock frequency is 16MHz.
y Up to 800kHz SPS conversion rate, conversion time is less than 1.25us.
y 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 lowest numbered channel to the highest numbered channel.
- Continuous scan mode: A/D converter continuously performs Single-cycle scan mode until
software stops A/D conversion.
y An A/D conversion can be started by
- Software write 1 to ADST bit
- External pin STADC
y Conversion results are held in data registers for each channel with valid and overrun indicators.
y Conversion result can be compared with specify value and user can select whether to generate
an interrupt when conversion result is equal to the compare register setting.
y Channel 7 supports 4 input sources: external analog voltage, internal fixed bandgap voltage,
internal temperature sensor output and analog ground.
y Support Self-calibration to minimum conversion error.