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tinyAVR® 0-series ATtiny202/204/402/404/406

ATtiny202 ATtiny204 ATtiny402 ATtiny404 ATtiny406

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10 CLKCTRL - Clock Controller
10.5 Register Description

ATtiny202/204/402/404/406

Introduction
Features
1 Silicon Errata and Data Sheet Clarification Document
2 tinyAVR® 0-series Overview
3 Block Diagram
4 Pinout
5 I/O Multiplexing and Considerations
6 Memories
7 Peripherals and Architecture
8 AVR® CPU
9 NVMCTRL - Nonvolatile Memory Controller
10 CLKCTRL - Clock Controller
- 10.1 Features
- 10.2 Overview
- 10.3 Functional Description
- 10.4 Register Summary
- 10.5 Register Description
  - 10.5.1 Main Clock Control A
    Main Clock Control A
  - 10.5.2 Main Clock Control B
    Main Clock Control B
  - 10.5.3 Main Clock Lock
    Main Clock Lock
  - 10.5.4 Main Clock Status
    Main Clock Status
  - 10.5.5 16/20 MHz Oscillator Control A
    16/20 MHz Oscillator Control A
  - 10.5.6 16/20 MHz Oscillator Calibration A
    16/20 MHz Oscillator Calibration A
  - 10.5.7 16/20 MHz Oscillator Calibration B
    16/20 MHz Oscillator Calibration B
  - 10.5.8 32.768 kHz Oscillator Control A
    32.768 kHz Oscillator Control A
11 SLPCTRL - Sleep Controller
12 RSTCTRL - Reset Controller
13 CPUINT - CPU Interrupt Controller
14 EVSYS - Event System
15 PORTMUX - Port Multiplexer
16 PORT - I/O Pin Configuration
17 BOD - Brown-out Detector
18 VREF - Voltage Reference
19 WDT - Watchdog Timer
20 TCA - 16-bit Timer/Counter Type A
21 TCB - 16-Bit Timer/Counter Type B
22 RTC - Real-Time Counter
23 USART - Universal Synchronous and Asynchronous Receiver and Transmitter
24 SPI - Serial Peripheral Interface
25 TWI - Two-Wire Interface
26 CRCSCAN - Cyclic Redundancy Check Memory Scan
27 CCL - Configurable Custom Logic
28 AC - Analog Comparator
29 ADC - Analog-to-Digital Converter
30 UPDI - Unified Program and Debug Interface
31 Instruction Set Summary
32 Conventions
33 Electrical Characteristics
34 Typical Characteristics
35 Ordering Information
36 Package Drawings
37 Errata
38 Data Sheet Revision History
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10.5 Register Description

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