Device Recovery
Use CTRL-AP mass erase to recover an APPROTECT-locked device. All flash and UICR will be erased.
Firmware Image
No image loaded
Debug (Cortex-M)
Halt/resume/step the Cortex-M core via DHCSR. Target must be connected.
Memory Read
UICR (nRF52)
User Information Configuration Registers. Read-only unless device is unlocked and NVMC write-enabled.
RTT (Real-Time Transfer)
Searches target RAM for SEGGER RTT control block, then polls ring buffer. Target must be running firmware with RTT initialized.
UART (DAP)
Uses the probe's DAP_UART commands. Requires probe with UART capability (bit 7).
Not connected