Atmel Xplained Pro Evaluation Kit for the ATSAMD21J18A Microcontroller ATSAMD21-XPRO ATSAMD21-XPRO Data Sheet
Product codes
ATSAMD21-XPRO
387
Atmel | SMART SAM D21 [DATASHEET]
Atmel-42181C–SAM-D21_Datasheet–07/2014
22.8.10 Control
Name:
CTRL
Offset:
0x24+x*0x80 [x=0..2]
Reset:
0x00000000
Property:
Write-Protected
z
Bits 31:0 – SAMPLING[31:0]: Input Sampling Mode
Configures the input sampling functionality of the I/O pin input samplers for pins configured as inputs via the Data
Direction register (DIR).
0: The I/O pin input synchronizer is disabled.
1: The I/O pin input synchronizer is enabled.
The input samplers are enabled and disabled in sub-groups of eight. Thus, if any pins within a byte request contin-
uous sampling, all pins in that eight pin sub-group will be continuously sampled.
Configures the input sampling functionality of the I/O pin input samplers for pins configured as inputs via the Data
Direction register (DIR).
0: The I/O pin input synchronizer is disabled.
1: The I/O pin input synchronizer is enabled.
The input samplers are enabled and disabled in sub-groups of eight. Thus, if any pins within a byte request contin-
uous sampling, all pins in that eight pin sub-group will be continuously sampled.
Bit
31
30
29
28
27
26
25
24
SAMPLING[31:24]
Access
W
W
W
W
W
W
W
W
Reset
0
0
0
0
0
0
0
0
Bit
23
22
21
20
19
18
17
16
SAMPLING[23:16]
Access
W
W
W
W
W
W
W
W
Reset
0
0
0
0
0
0
0
0
Bit
15
14
13
12
11
10
9
8
SAMPLING[15:8]
Access
W
W
W
W
W
W
W
W
Reset
0
0
0
0
0
0
0
0
Bit
7
6
5
4
3
2
1
0
SAMPLING[7:0]
Access
W
W
W
W
W
W
W
W
Reset
0
0
0
0
0
0
0
0