Table of Contents
Introduction......................................................................................................................1
Feature............................................................................................................................ 1
1. Description.................................................................................................................4
2. Configuration Summary............................................................................................. 5
3. Ordering Information .................................................................................................6
3.1. ATmega48A..................................................................................................................................6
3.2. ATmega88A .................................................................................................................................7
3.3. ATmega168A ...............................................................................................................................8
4. Block Diagram........................................................................................................... 9
5. Pin Configurations................................................................................................... 10
5.1. Pin-out........................................................................................................................................ 10
5.2. Pin Descriptions..........................................................................................................................14
6. I/O Multiplexing........................................................................................................16
7. Resources................................................................................................................18
8. Data Retention.........................................................................................................19
9. About Code Examples.............................................................................................20
10. Capacitive Touch Sensing....................................................................................... 21
10.1. QTouch Library........................................................................................................................... 21
11. Packaging Information.............................................................................................22
11.1. 32-pin 32A.................................................................................................................................. 22
11.2. 32-pin 32M1-A............................................................................................................................23
11.3. 32-pin 32CC1............................................................................................................................. 24
11.4. 28-pin 28M1................................................................................................................................25
11.5. 28-pin 28P3................................................................................................................................ 26