Data Sheet

899
Atmel | SMART SAM D21 [DATASHEET]
Atmel-42181G–SAM-D21_Datasheet–09/2015
33.9.2 Control B
Name: CTRLB
Offset: 0x01
Reset: 0x00
Property: -
z Bits 7:2 – 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 Bits 1:0 – STARTx [x=1..0]: Comparator x Start Comparison
Writing a zero to this field has no effect.
Writing a one to STARTx starts a single-shot comparison on COMPx if both the Single-Shot and Enable bits in the
Comparator x Control Register are one (COMPCTRLx.SINGLE and COMPCTRLx.ENABLE). If comparator x is
not implemented, or if it is not enabled in single-shot mode, writing a one has no effect.
This bit always reads as zero.
Bit 76543210
START1 START0
AccessRRRRRRWW
Reset00000000