7.7 NVM User Row Mapping

The first two 32-bit words of the NVM User Row contain calibration data that are automatically read at device power on.

The NVM User Row can be read at address 0x804000.

To write the NVM User Row, refer to the NVMCTRL – Non-Volatile Memory Controller.

When writing to the user row, the values do not get loaded by other modules on the device until a device Reset occurs.

Table 7-6. NVM User Row Mapping
Bit Position	Name	Usage
2:0	BOOTPROT	Used to select one of eight different bootloader sizes. Refer to the “NVMCTRL – Non-Volatile Memory Controller”. Default value = 0x7.
3⁽¹⁾	Reserved	Do not modify the value of a reserved bit. Reading a reserved bit has no significance to the user application.
6:4	EEPROM	Used to select one of eight different EEPROM Emulation sizes. Refer to NVMCTRL – Non-Volatile Memory Controller. Default value = 7.
7⁽¹⁾	Reserved	Do not modify the value of a reserved bit. Reading a reserved bit has no significance to the user application.
13:8	BOD33 Level	BOD33 Threshold Level at power on. Refer to SYSCTRL BOD33 register.  Default value = 7.
14	BOD33 Enable	BOD33 Enable at power on . Refer to SYSCTRL BOD33 register. Default value = 1.
16:15	BOD33 Action	BOD33 Action at power on. Refer to SYSCTRL BOD33 register. Default value = 1.
24:17⁽¹⁾	Reserved	Do not modify the value of a reserved bit. Reading a reserved bit has no significance to the user application.
25	WDT Enable	WDT Enable at power on. Refer to WDT CTRL register.  Default value = 0.
26	WDT Always-On	WDT Always-On at power on. Refer to WDT CTRL register.  Default value = 0.
30:27	WDT Period	WDT Period at power on. Refer to WDT CONFIG register.  Default value = 0x0B.
34:31	WDT Window	WDT Window mode time-out at power on. Refer to WDT CONFIG register.  Default value = 0x0B.
38:35	WDT EWOFFSET	WDT Early Warning Interrupt Time Offset at power on. Refer to WDT EWCTRL register. Default value = 0xB.
39	WDT WEN	WDT Timer Window Mode Enable at power on. Refer to WDT CTRL register. Default value = 0.
40	BOD33 Hysteresis	BOD33 Hysteresis configuration at power on. Refer to SYSCTRL BOD33 register.  Default value = 1.
47:41	Reserved	Do not modify the value of a reserved bit. Reading a reserved bit has no significance to the user application.
63:48	LOCK	NVM Region Lock Bits. Refer to NVMCTRL – Non-Volatile Memory Controller.  Default value = 0xFFFF.

Note:

It is required to preserve the value of a reserved bit while modifying the NVM User Row bits.