Data Sheet

31
Atmel | SMART SAM D21 [DATASHEET]
Atmel-42181G–SAM-D21_Datasheet–09/2015
Table 9-4. NVM User Row Mapping
9.3.2 NVM Software Calibration Area Mapping
The NVM Software Calibration Area contains calibration data that are measured and written during production test.
These calibration values should be read by the application software and written back to the corresponding register.
The NVM Software Calibration Area can be read at address 0x806020.
The NVM Software Calibration Area can not be written.
Bit Position Name Usage
2:0 BOOTPROT
Used to select one of eight different bootloader sizes. Refer to “NVMCTRL –
Non-Volatile Memory Controller” on page 355. Default value = 7.
3 Reserved
6:4 EEPROM
Used to select one of eight different EEPROM sizes. Refer to “NVMCTRL –
Non-Volatile Memory Controller” on page 355. Default value = 7.
7 Reserved
13:8 BOD33 Level
BOD33 Threshold Level at power on. Refer to BOD33 register.
Default value = 7.
14 BOD33 Enable BOD33 Enable at power on . Refer to BOD33 register. Default value = 1.
16:15 BOD33 Action BOD33 Action at power on. Refer to BOD33 register. Default value = 1.
24:17 Reserved
Voltage Regulator Internal BOD (BOD12) configuration. These bits are written
in production and must not be changed. Default value = 0x70.
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 = 0x05.
38:35 WDT EWOFFSET
WDT Early Warning Interrupt Time Offset at power on. Refer to WDT
EWCTRL register. Default value = 0x0B.
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 BOD33 register.
Default value = 0.
41 Reserved
Voltage Regulator Internal BOD(BOD12) configuration. This bit is written in
production and must not be changed. Default value = 0.
47:42 Reserved
63:48 LOCK
NVM Region Lock Bits. Refer to “NVMCTRL – Non-Volatile Memory
Controller” on page 355.
Default value = 0xFFFF.