Atmel Xplained Pro Evaluation Kit ATSAMD20-XPRO ATSAMD20-XPRO Data Sheet
Product codes
ATSAMD20-XPRO
292
Atmel | SMART SAM D20 [DATASHEET]
Atmel-42129K–SAM-D20_datasheet–06/2014
21.8.2 Data Direction Clear
This register allows the user to set one or more I/O pins as an input, without doing a read-modify-write operation.
Changes in this register will also be reflected in the Data Direction (DIR), Data Direction Toggle (DIRTGL) and Data
Direction Set (DIRSET) registers.
Changes in this register will also be reflected in the Data Direction (DIR), Data Direction Toggle (DIRTGL) and Data
Direction Set (DIRSET) registers.
Name:
DIRCLR
Offset:
0x04+x*0x80 [x=0..1]
Reset:
0x00000000
Property:
Write-Protected
z
Bits 31:0 – DIRCLR[31:0]: Port Data Direction Clear
0: The I/O pin direction is cleared.
0: The I/O pin direction is cleared.
1: The I/O pin direction is set.
Writing a zero to a bit has no effect.
Writing a one to a bit will clear the corresponding bit in the DIR register, which configures the I/O pin as an input.
Bit
31
30
29
28
27
26
25
24
DIRCLR[31:24]
Access
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
Reset
0
0
0
0
0
0
0
0
Bit
23
22
21
20
19
18
17
16
DIRCLR[23:16]
Access
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
Reset
0
0
0
0
0
0
0
0
Bit
15
14
13
12
11
10
9
8
DIRCLR[15:8]
Access
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
Reset
0
0
0
0
0
0
0
0
Bit
7
6
5
4
3
2
1
0
DIRCLR[7:0]
Access
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
Reset
0
0
0
0
0
0
0
0