Jump to main content

ATmega8A Data Sheet

Home
13 System Clock and Clock Options
13.9 Register Description

Introduction
Features
1 Description
2 Configuration Summary
3 Ordering Information
4 Block Diagram
5 Pin Configurations
6 I/O Multiplexing
7 Resources
8 Data Retention
9 About Code Examples
10 Capacitive Touch Sensing
11 AVR CPU Core
12 AVR Memories
13 System Clock and Clock Options
- 13.1 Clock Systems and their Distribution
- 13.2 Clock Sources
- 13.3 Crystal Oscillator
- 13.4 Low-frequency Crystal Oscillator
- 13.5 External RC Oscillator
- 13.6 Calibrated Internal RC Oscillator
- 13.7 External Clock
- 13.8 Timer/Counter Oscillator
- 13.9 Register Description
  - 13.9.1 OSCCAL – The Oscillator Calibration Register
    OSCCAL – The Oscillator Calibration Register
14 Power Management and Sleep Modes
15 System Control and Reset
16 Interrupts
17 External Interrupts
18 I/O Ports
19 8-bit Timer/Counter0
20 Timer/Counter0 and Timer/Counter1 Prescalers
21 16-bit Timer/Counter1
22 8-bit Timer/Counter2 with PWM and Asynchronous Operation
23 SPI – Serial Peripheral Interface
24 USART - Universal Synchronous and Asynchronous serial Receiver and Transmitter
25 TWI - Two-wire Serial Interface
26 AC - Analog Comparator
27 ADC - Analog to Digital Converter
28 BTLDR - Boot Loader Support – Read-While-Write Self-Programming
29 MEMPROG- Memory Programming
30 Electrical Characteristics – TA = -40°C to 85°C
31 Electrical Characteristics – TA = -40°C to 105°C
32 Typical Characteristics – TA = -40°C to 85°C
33 Typical Characteristics – TA = -40°C to 105°C
34 Register Summary
35 Instruction Set Summary
36 Packaging Information
37 Errata
38 Appendix A: Revision History
The Microchip Web Site
Customer Change Notification Service
Customer Support
Microchip Devices Code Protection Feature
Legal Notice
Trademarks
Quality Management System Certified by DNV
Worldwide Sales and Service

13.9 Register Description

The online versions of the documents are provided as a courtesy. Verify all content and data in the device’s PDF documentation found on the device product page.

Microchip Facebook

Microchip LinkedIn

Microchip Twitter

Microchip YouTube

Microchip Instagram

Microchip Weibo

Contact |

Legal |

Privacy Policy |

Cookies |

Careers

Stay on the leading edge with our blog

© Copyright 1998-2022 Microchip Technology Inc. All rights reserved.