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AVR32SD20/28/32 Preliminary Data Sheet
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AVR32SD20
AVR32SD28
AVR32SD32
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22
ERRCTRL - Error Controller
22.3
Functional Description
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
22.1
Features
22.2
Overview
22.3
Functional Description
22.3.1
Overview
22.3.2
Severity Levels
22.3.3
System States
22.3.4
Timeout Timer
22.3.5
CPU Dual Core Lockstep Comparator Error
22.3.6
Clearing Error Signals
22.3.7
Heartbeat
22.3.8
Automatic Float of I/O Pins
22.3.9
Error Injection
22.3.10
Protecting Register Contents
22.3.11
Data Bus Accesses
22.3.12
Internal Consistency Checks
22.3.13
Reset Requests
22.3.14
Effect of Reset on Registers
22.3.15
Error Channel Connections
22.3.16
Imprecise Errors
22.3.17
Errors During System Initialization
22.3.18
Error Controller and System Startup
22.3.19
Interrupts
22.3.20
Events
22.3.21
Sleep Mode Operation
22.3.22
Functional Safety
22.4
Register Summary
22.5
Register Description
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
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
22.3 Functional Description
