Atmel Xplained Pro Evaluation Kit for the ATSAMD21J18A Microcontroller ATSAMD21-XPRO ATSAMD21-XPRO Data Sheet
Product codes
ATSAMD21-XPRO
383
Atmel | SMART SAM D21 [DATASHEET]
Atmel-42181C–SAM-D21_Datasheet–07/2014
22.8.6 Data Output Value Clear
This register allows the user to set one or more output I/O pin drive levels low, without doing a read-modify-write
operation. Changes in this register will also be reflected in the Data Output Value (OUT), Data Output Value Toggle
(OUTTGL) and Data Output Value Set (OUTSET) registers.
operation. Changes in this register will also be reflected in the Data Output Value (OUT), Data Output Value Toggle
(OUTTGL) and Data Output Value Set (OUTSET) registers.
Name:
OUTCLR
Offset:
0x14+x*0x80 [x=0..2]
Reset:
0x00000000
Property:
Write-Protected
z
Bits 31:0 – OUTCLR[31:0]: Port Data Output Value Clear
0: The I/O pin output is driven low.
1: The I/O pin output is driven high.
Writing a zero to a bit has no effect.
Writing a one to a bit will clear the corresponding bit in the OUT register, which sets the output drive level low for
I/O pins configured as outputs via the Data Direction register (DIR). For pins configured as inputs via the Data
Direction register (DIR) and with pull enabled via the Pull Enable register (PULLEN), these bits will set the input
pull direction to an internal pull-down.
0: The I/O pin output is driven low.
1: The I/O pin output is driven high.
Writing a zero to a bit has no effect.
Writing a one to a bit will clear the corresponding bit in the OUT register, which sets the output drive level low for
I/O pins configured as outputs via the Data Direction register (DIR). For pins configured as inputs via the Data
Direction register (DIR) and with pull enabled via the Pull Enable register (PULLEN), these bits will set the input
pull direction to an internal pull-down.
Bit
31
30
29
28
27
26
25
24
OUTCLR[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
OUTCLR[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
OUTCLR[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
OUTCLR[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