Module atsamd_hal::nvm
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Non-volatile Memory Controller
This module allows users to interact with non-volatile memory controller.
NVMCTRL is an intermediary between memory buses and physical non-volatile
memory. It provides means of managing a flash memory content, its properties
(cache, wait states, bootloader blocks protection), power management and
address remapping if necessary (in case bank mechanism is used). It also
provides an indirection mechanism to achieve non-volatile RAM-like memory
within last sectors of a physical flash (More in smart_eeprom module).
NVM supports splitting flash into two sections (opt-in feature) called
banks. Bank considered active is mapped to virtual address 0x0, meaning
it contains currently executed application. Through NVM command & control
interface, banks can be swapped and MCU reset, so the firmware from the
other bank will run after restart.
Module features:
- Erase & write over non-volatile memory in a device.
- Swap banks