Atmel | SMART SAM4E16E SAM4E8E SAM4E16C SAM4E8C Datasheet
SAM4E Series [DATASHEET] Atmel-11157F-ATARM-SAM4E16-SAM4E8-Datasheet_27-Apr-15 10 3. TDO pin is set in input mode when the Cortex-M4 Core is not in debug mode. Thus the internal pull-up corresponding to this PIO line must be enabled to avoid ......