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12 Memories
12.10 FUSE - Configuration and User Fuses
12.10.2 Fuse 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
- 12.1 Overview
- 12.2 Memory Map
- 12.3 In-System Reprogrammable Flash Program Memory
- 12.4 Program and Debug Interface Disable (PDID)
- 12.5 SRAM Data Memory
- 12.6 EEPROM Data Memory
- 12.7 SIGROW - Signature Row
- 12.8 BOOTROW - Boot Row
- 12.9 USERROW - User Row
- 12.10 FUSE - Configuration and User Fuses
  - 12.10.1 Fuse Summary
  - 12.10.2 Fuse Description
    - 12.10.2.1 Watchdog Configuration
      Watchdog Configuration
    - 12.10.2.2 Brown-out Detector Configuration
      Brown-out Detector Configuration
    - 12.10.2.3 System Configuration 0
      System Configuration 0
    - 12.10.2.4 System Configuration 1
      System Configuration 1
    - 12.10.2.5 Code Size
      Code Size
    - 12.10.2.6 Boot Size
      Boot Size
    - 12.10.2.7 Programming and Debug Interface Configuration
      Programming and Debug Interface Configuration
- 12.11 LOCK - Memory Sections Access Protection
- 12.12 I/O Memory
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
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