1.2 Pin Description

The pin description can be found in any device data sheet. The pinout is contained in the Pinout, Pin Configurations section, or any other name convention, depending on the device. The pinout of the ATmega809/1609/3209/4809 48-pin devices is presented in Figure 1-1.

Figure 1-1. ATmega809/1609/3209/4809 48-Pin Pinout(1)

The configurable functionalities for each I/O pin are described in the I/O Multiplexing and Considerations section, or the Alternate Port Functions subsection of the I/O Ports section, depending on the device. If an evaluation board is used, such as AVR128DA48 Curiosity Nano, the user needs to know how the microcontroller’s pins are allocated on the specific board. The information is available on the AVR128DA48 Curiosity Nano webpage, in the AVR128DA48 Curiosity Nano Schematics document. Other documents that describe the AVR128DA48 Curiosity Nano board and microcontroller characteristics are available on the same webpage.