With this app you can:
Obtain the register values to configure the following periphericals in the ATMEL's AVRs:

For TIMERs you can get the TCNT preload to obtain specific delays.

For TWI (I2C) obtain the TWBR values that provides the desired operation frecuency.

For USART obtain the UBRR value for an especific baudrate.

Contains a mini database of pinouts for various AVR models.

Decimal to hexadecimal converter.