Datasheet

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.
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.
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 3130292827262524
DIRCLR[31:24]
Access R/W R/W R/W R/W R/W R/W R/W R/W
Reset00000000
Bit2322212019181716
DIRCLR[23:16]
Access R/W R/W R/W R/W R/W R/W R/W R/W
Reset00000000
Bit151413121110 9 8
DIRCLR[15:8]
Access R/W R/W R/W R/W R/W R/W R/W R/W
Reset00000000
Bit76543210
DIRCLR[7:0]
Access R/W R/W R/W R/W R/W R/W R/W R/W
Reset00000000