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AVR® DD Family

AVR32DD20 AVR32DD14 AVR16DD20 AVR16DD14

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21 VREF - Voltage Reference
21.3 Functional Description

Introduction
AVR® DD Family Overview
Features
1 Block Diagram
2 Pinout
3 I/O Multiplexing and Considerations
4 Hardware Guidelines
5 Power Supply
6 Conventions
7 AVR® CPU
8 Memories
9 Peripherals and Architecture
10 GPR - General Purpose Registers
11 NVMCTRL - Nonvolatile Memory Controller
12 CLKCTRL - Clock Controller
13 SLPCTRL - Sleep Controller
14 RSTCTRL - Reset Controller
15 CPUINT - CPU Interrupt Controller
16 EVSYS - Event System
17 PORTMUX - Port Multiplexer
18 PORT - I/O Pin Configuration
19 MVIO - Multi-Voltage I/O
20 BOD - Brown-out Detector
21 VREF - Voltage Reference
22 WDT - Watchdog Timer
23 TCA - 16-bit Timer/Counter Type A
24 TCB - 16-Bit Timer/Counter Type B
25 TCD - 12-Bit Timer/Counter Type D
26 RTC - Real-Time Counter
27 USART - Universal Synchronous and Asynchronous Receiver and Transmitter
28 SPI - Serial Peripheral Interface
29 TWI - Two-Wire Interface
30 CRCSCAN - Cyclic Redundancy Check Memory Scan
31 CCL - Configurable Custom Logic
32 AC - Analog Comparator
33 ADC - Analog-to-Digital Converter
34 DAC - Digital-to-Analog Converter
35 ZCD - Zero-Cross Detector
36 UPDI - Unified Program and Debug Interface
37 Instruction Set Summary
38 Electrical Characteristics
39 Characteristics Graphs
40 Ordering Information
41 Package Drawings
42 Data Sheet Revision History
Microchip Information

21.3 Functional Description

The online versions of the documents are provided as a courtesy. Verify all content and data in the device’s PDF documentation found on the device product page.

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