7.2.2 aWire Physical

aWire is a single-pin interface for programming and debugging of low-pin-count Atmel AVR UC3 devices using the RESET pin. All features of the OCD system available through the JTAG interface can also be accessed using aWire.

When designing an application PCB which includes an AVR with the aWire interface, the pinout shown in Figure 4-6 should be used.