7.4.7 On-Chip Debug Capabilities

The AVR CPU includes native On-Chip Debug (OCD) support. It contains some powerful debug capabilities to enable profiling and detailed information about the CPU state. It is possible to alter the CPU state and resume code execution. Also, normal debug capabilities like hardware Program Counter breakpoints, breakpoints on change of flow instructions, breakpoints on interrupts, and software breakpoints (BREAK instruction) are present. Refer to the UPDI - Unified Program and Debug Interface section for details about OCD.