Data Sheet

65
Atmel | SMART SAM D21 [DATASHEET]
Atmel-42181G–SAM-D21_Datasheet–09/2015
12.13.1 Control
Name: CTRL
Offset: 0x0000
Reset: 0x00
Property: Write-Protected
z Bits 7:5 – Reserved
These bits are unused and reserved for future use. For compatibility with future devices, always write these bits to
zero when this register is written. These bits will always return zero when read.
z Bit 4 – CE: Chip Erase
Writing a zero to this bit has no effect.
Writing a one to this bit starts the Chip-Erase operation.
z Bit 3 – MBIST: Memory Built-In Self-Test
Writing a zero to this bit has no effect.
Writing a one to this bit starts the memory BIST algorithm.
z Bit 2 – CRC: 32-bit Cyclic Redundancy Check
Writing a zero to this bit has no effect.
Writing a one to this bit starts the cyclic redundancy check algorithm.
z Bit 1 – Reserved
This bit is unused and reserved for future use. For compatibility with future devices, always write this bit to zero
when this register is written. This bit will always return zero when read.
z Bit 0 – SWRST: Software Reset
Writing a zero to this bit has no effect.
Writing a one to this bit resets the module.
Bit 76543210
CE MBIST CRC SWRST
Access R R R W W W R W
Reset00000000