Standby Controller (SCR) is an 8-bit microcontroller that can continue to run during standby mode. It is based on the XC800 Core which is compatible with the industry standard 8051 processor and is available on selected TC3xxx devices. SCR core is selectable in winIDEA as any other core.
SCR debugging can be achieved via:
Before you can start debugging the SCR core via SoC DAP or as the primary core via the Private DAP interface, the chip must be properly enabled and configured.
More resources in winIDEA Help SCR debugging.