Atmel AVR XMEGA AU series User Manual

153
8331B–AVR–03/12
Atmel AVR XMEGA AU
13.13 Register Descriptions – Ports
13.13.1 DIR – Data Direction register
• Bit 7:0 – DIR[7:0]: Data Direction
This register sets the data direction for the individual pins of the port. If DIRn is written to one,
pin n is configured as an output pin. If DIRn is written to zero, pin n is configured as an input pin.
13.13.2 DIRSET – Data Direction Set Register
• Bit 7:0 – DIRSET[7:0]: Port Data Direction Set
This register can be used instead of a read-modify-write to set individual pins as output. Writing
a one to a bit will set the corresponding bit in the DIR register. Reading this register will return
the value of the DIR register.
13.13.3 DIRCLR – Data Direction Clear register
• Bit 7:0 – DIRCLR[7:0]: Port Data Direction Clear
This register can be used instead of a read-modify-write to set individual pins as input. Writing a
one to a bit will clear the corresponding bit in the DIR register. Reading this register will return
the value of the DIR register.
13.13.4 DIRTGL – Data Direction Toggle register
Bit 76543210
+0x00 DIR[7:0] DIR
Read/Write R/W R/W R/W R/W R/W R/W R/W R/W
Initial Value00000000
Bit 76543210
+0x01 DIRSET[7:0] DIRSET
Read/Write R/W R/W R/W R/W R/W R/W R/W R/W
Initial Value00000000
Bit 76543210
+0x02 DIRCLR[7:0] DIRCLR
Read/Write R/W R/W R/W R/W R/W R/W R/W R/W
Initial Value00000000
Bit 76543210
+0x03 DIRTGL[7:0] DIRTGL
Read/Write R/W R/W R/W R/W R/W R/W R/W R/W
Initial Value00000000

Atmel AVR XMEGA AU series Specifications

General

Brand	Atmel
Model	AVR XMEGA AU series
Category	Microcontrollers
Language	English