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tinyAVR® 2 Family ATtiny3224/3226/3227

ATtiny3224 ATtiny3226 ATtiny3227

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7 Memories
7.9 SIGROW - Signature Row
7.9.2 Signature Row Description

ATtiny3224/3226/3227

Introduction
tinyAVR® 2 Family Overview
Features
1 Block Diagram
2 Pinout
3 I/O Multiplexing and Considerations
4 Hardware Guidelines
5 Conventions
6 AVR® CPU
7 Memories
- 7.1 Overview
- 7.2 Memory Map
- 7.3 In-System Reprogrammable Flash Program Memory
- 7.4 SRAM Data Memory
- 7.5 EEPROM Data Memory
- 7.6 USERROW - User Row
- 7.7 LOCKBIT - Memory Sections Access Protection
- 7.8 FUSE - Configuration and User Fuses
- 7.9 SIGROW - Signature Row
  - 7.9.1 Signature Row Summary
  - 7.9.2 Signature Row Description
    - 7.9.2.1 Device ID n
      Device ID n
    - 7.9.2.2 Serial Number Byte n
      Serial Number Byte n
    - 7.9.2.3 OSC16 Calibration Byte
      OSC16 Calibration Byte
    - 7.9.2.4 OSC16 Temperature Calibration Byte
      OSC16 Temperature Calibration Byte
    - 7.9.2.5 OSC20 Calibration Byte
      OSC20 Calibration Byte
    - 7.9.2.6 OSC20 Temperature Calibration Byte
      OSC20 Temperature Calibration Byte
    - 7.9.2.7 Temperature Sensor Calibration n
      Temperature Sensor Calibration n
- 7.10 I/O Memory
8 Peripherals and Architecture
9 General Purpose I/O Registers
10 NVMCTRL - Nonvolatile Memory Controller
11 CLKCTRL - Clock Controller
12 SLPCTRL - Sleep Controller
13 RSTCTRL - Reset Controller
14 CPUINT - CPU Interrupt Controller
15 EVSYS - Event System
16 PORTMUX - Port Multiplexer
17 PORT - I/O Pin Configuration
18 BOD - Brown-out Detector
19 VREF - Voltage Reference
20 WDT - Watchdog Timer
21 TCA - 16-bit Timer/Counter Type A
22 TCB - 16-Bit Timer/Counter Type B
23 RTC - Real-Time Counter
24 USART - Universal Synchronous and Asynchronous Receiver and Transmitter
25 SPI - Serial Peripheral Interface
26 TWI - Two-Wire Interface
27 CRCSCAN - Cyclic Redundancy Check Memory Scan
28 CCL - Configurable Custom Logic
29 AC - Analog Comparator
30 ADC - Analog-to-Digital Converter
31 UPDI - Unified Program and Debug Interface
32 Instruction Set Summary
33 Electrical Characteristics
34 Typical Characteristics
35 Ordering Information
36 Package Drawings
37 Data Sheet Revision History
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7.9.2 Signature Row Description

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