Atmel Xplained Pro Evaluation Kit for the ATSAMD21J18A Microcontroller ATSAMD21-XPRO ATSAMD21-XPRO Data Sheet
Product codes
ATSAMD21-XPRO
852
Atmel | SMART SAM D21 [DATASHEET]
Atmel-42181C–SAM-D21_Datasheet–07/2014
32.8.5 Control B
Name:
CTRLB
Offset:
0x04
Reset:
0x0000
Property:
Write-Protected, Write-Synchronized
z
Bits 15:11 – 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.
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 10:8 – PRESCALER[2:0]: Prescaler Configuration
These bits define the ADC clock relative to the peripheral clock according to
These bits define the ADC clock relative to the peripheral clock according to
Table 32-9. Prescaler Configuration
z
Bits 7:6 – 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.
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 5:4 – RESSEL[1:0]: Conversion Result Resolution
These bits define whether the ADC completes the conversion at 12-, 10- or 8-bit result resolution.
These bits define whether the ADC completes the conversion at 12-, 10- or 8-bit result resolution.
Bit
15
14
13
12
11
10
9
8
PRESCALER[2:0]
Access
R
R
R
R
R
R/W
R/W
R/W
Reset
0
0
0
0
0
0
0
0
Bit
7
6
5
4
3
2
1
0
RESSEL[1:0]
CORREN
FREERUN
LEFTADJ
DIFFMODE
Access
R
R
R/W
R/W
R/W
R/W
R/W
R/W
Reset
0
0
0
0
0
0
0
0
PRESCALER[2:0]
Name
Description
0x0
DIV4
Peripheral clock divided by 4
0x1
DIV8
Peripheral clock divided by 8
0x2
DIV16
Peripheral clock divided by 16
0x3
DIV32
Peripheral clock divided by 32
0x4
DIV64
Peripheral clock divided by 64
0x5
DIV128
Peripheral clock divided by 128
0x6
DIV256
Peripheral clock divided by 256
0x7
DIV512
Peripheral clock divided by 512