Rainbow Electronics ATmega3290P_V - Manual (Page 8)

8
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 V
LCD
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”.