# Private Peripherals Registers

For the user’s convenience, the registers for the private peripherals are grouped in separate sections according to peripheral.

NOTE: Arm's NVIC private peripheral includes registers supporting up to 256 external interrupts (described in the ARM Cortex-M33 Technical Reference Manual). Registers that are explicitly used by RSL15 are shown in NVIC Registers. Additional registers can be used in the NVIC support firmware, to enable compatibility with all of onsemi's Arm Cortex-M-series-based devices.