ATMEGA3290 datasheet(8/375 Pages) ATMEL

8 / 375 page

ATmega329/3290/649/6490

2552H–AVR–11/06

XTAL2

Output from the inverting Oscillator amplifier.

AVCC

AVCC is the supply voltage pin for Port F and the A/D Converter. It should be externally

connected to V

CC, even if the ADC is not used. If the ADC is used, it should be con-

nected to V

CC through a low-pass filter.

AREF

This is the analog reference pin for the A/D Converter.

LCDCAP

An external capacitor (typical > 470 nF) must be connected to the LCDCAP pin as

shown in Figure 99. This capacitor acts as a reservoir for LCD power (V

LCD). A large

capacitance reduces ripple on V

LCD but increases the time until VLCD reaches its target

value.

Resources

A comprehensive set of development tools, application notes and datasheets are avail-

able for download on http://www.atmel.com/avr.

About 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 defini-

tions in the header files and interrupt handling in C is compiler dependent. Please con-

firm with the C compiler documentation for more details.

For I/O Registers located in 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 “LDS” and “STS” combined with “SBRS”, “SBRC”, “SBR”, and “CBR”.

ATMEGA3290 Datasheet(PDF) 8 Page - ATMEL Corporation