10.3 NVM User Row Mapping

The Non Volatile Memory (NVM) User Row contains calibration data that are automatically read at device power-on.

The NVM User Row can be read at address 0x00804000.

To write the NVM User Row refer to the documentation of the NVMCTRL - Non-Volatile Memory Controller.

Note: When writing to the User Row, the new values do not get loaded by the other peripherals on the device until a device Reset occurs.
Table 10-4. NVM User Row Mapping
Bit Pos. Name Usage Factory Setting Related Peripheral Register
2:0 BOOTPROT Used to select one of eight different bootloader sizes. 0x7 NVMCTRL
3 Reserved 0x1
6:4 EEPROM Used to select one of eight different EEPROM sizes. 0x7 NVMCTRL
7 Reserved 0x1
13:8 BOD33 Level BOD33 threshold level at power-on. 0x06 SUPC.BOD33
14 BOD33 Disable BOD33 Disable at power-on. 0x0 SUPC.BOD33
16:15 BOD33 Action BOD33 Action at power-on. 0x1 SUPC.BOD33
25:17 Reserved Factory settings - do not change. 0x08F -
26 WDT Enable WDT Enable at power-on. 0x0 WDT.CTRLA
27 WDT Always-On WDT Always-On at power-on. 0x0 WDT.CTRLA
31:28 WDT Period WDT Period at power-on. 0xB WDT.CONFIG
35:32 WDT Window WDT Window mode time-out at power-on. 0xB WDT.CONFIG
39:36 WDT EWOFFSET WDT Early Warning Interrupt Time Offset at power-on. 0xB WDT.EWCTRL
40 WDT WEN WDT Timer Window Mode Enable at power-on. 0x0 WDT.CTRLA
41 BOD33 Hysteresis BOD33 Hysteresis configuration at power-on. 0x0 SUPC.BOD33
47:42 Reserved Factory settings - do not change. 0x3E
63:48 LOCK NVM Region Lock Bits. 0xFFFF NVMCTRL