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AVR32SD20/28/32 Preliminary Data Sheet
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AVR32SD20
AVR32SD28
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29
WDT - Watchdog Timer
29.2
Overview
29.2.1
Block Diagram
Introduction
Features
AVR® SD
Family Overview
1
Functional Safety Concept
2
Security Concept
3
Block Diagram
4
Pinout
5
I/O Multiplexing and Considerations
6
Hardware Guidelines
7
Power Supply
8
Conventions
9
BOOTROM - Boot ROM Code
10
AVR® CPU
11
BUSMATRIX - Bus Matrix
12
Memories
13
Peripherals and Architecture
14
Getting Started with Software Development
15
GPR - General Purpose Registers
16
NVMCTRL - Nonvolatile Memory Controller
17
RAMCTRL - RAM Controller
18
CLKCTRL - Clock Controller
19
SLPCTRL - Sleep Controller
20
RSTCTRL - Reset Controller
21
CPUINT - CPU Interrupt Controller
22
ERRCTRL - Error Controller
23
EVSYS - Event System
24
PORTMUX - Port Multiplexer
25
PORT - I/O Pin Configuration
26
MVIO - Multi-Voltage I/O
27
BOD - Brown-out Detector
28
VREF - Voltage Reference
29
WDT - Watchdog Timer
29.1
Features
29.2
Overview
29.2.1
Block Diagram
29.3
Functional Description
29.4
Register Summary
29.5
Register Description
30
SWDT - Synchronous Watchdog Timer
31
TCA - 16-bit Timer/Counter Type A
32
TCB - 16-Bit Timer/Counter Type B
33
TCD - 12-Bit Timer/Counter Type D
34
RTC - Real-Time Counter
35
USART - Universal Synchronous and Asynchronous Receiver and Transmitter
36
SPI - Serial Peripheral Interface
37
TWI - Two-Wire Interface
38
CRCSCAN - Cyclic Redundancy Check Memory Scan
39
CCL - Configurable Custom Logic
40
AC - Analog Comparator
41
ADC - Analog-to-Digital Converter
42
DAC - Digital-to-Analog Converter
43
ZCD - Zero-Cross Detector
44
UPDI - Unified Program and Debug Interface
45
Instruction Set Summary
46
Electrical Characteristics
47
Characteristics Graphs
48
Ordering Information
49
Package Drawings
50
Data Sheet Revision History
Microchip Information
29.2.1 Block Diagram
Figure 29-1.
WDT Block Diagram
