6

8197CS–AVR–05/11

ATtiny261A/461A/861A

3.

General Information

3.1

Resources

A comprehensive set of drivers, application notes, data sheets and descriptions on development

tools are available for download at http://www.atmel.com/avr.

3.2

Code Examples

This documentation contains simple code examples that briefly show how to use various parts of

the device. These code examples assume that the part specific header file is included before

compilation. Be aware that not all C compiler vendors include bit definitions in the header files

and interrupt handling in C is compiler dependent. Please confirm with the C compiler documen-

tation for more details.

For I/O Registers located in the extended I/O map, “IN”, “OUT”, “SBIS”, “SBIC”, “CBI”, and “SBI”

instructions must be replaced with instructions that allow access to extended I/O. Typically, this

means “LDS” and “STS” combined with “SBRS”, “SBRC”, “SBR”, and “CBR”. Note that not all

AVR devices include an extended I/O map.

3.3

Capacitive Touch Sensing

Atmel QTouch Library provides a simple to use solution for touch sensitive interfaces on Atmel

tion methods.

Touch sensing is easily added to any application by linking the QTouch Library and using the

Application Programming Interface (API) of the library to define the touch channels and sensors.

The application then calls the API to retrieve channel information and determine the state of the

touch sensor.

The QTouch Library is free and can be downloaded from the Atmel website. For more informa-

tion and details of implementation, refer to the QTouch Library User Guide – also available from

the Atmel website.

3.4

Data Retention

Reliability Qualification results show that the projected data retention failure rate is much less

than 1 PPM over 20 years at 85°C or 100 years at 25°C.