9.4 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 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 9-3. 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 except for WLCSP45 that has default value = 0x3. Note: WLCSP27 devices boot ROM is not protected as the bootloader is self-upgradable through the I²C interface. .
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 on all package grades except Extended Temperature with compliance to AEC-Q100 which has Default value = 34.
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.