ATxmega256A3 PORTA registers

The 21 registers of PORTA (Port Configuration), from 0x600, with their reset value and every field. The ATxmega256A3 has 599 registers in 63 peripherals, one page each.

PORTA Port Configuration

DIRI/O Port Data Direction

Address: 0x600
Reset: 0x00
Access: read/write

7DIR7
6DIR6
5DIR5
4DIR4
3DIR3
2DIR2
1DIR1
0DIR0

DIRSETI/O Port Data Direction Set

Address: 0x601
Reset: 0x00
Access: read/write

7DIRSET7
6DIRSET6
5DIRSET5
4DIRSET4
3DIRSET3
2DIRSET2
1DIRSET1
0DIRSET0

DIRCLRI/O Port Data Direction Clear

Address: 0x602
Reset: 0x00
Access: read/write

7DIRCLR7
6DIRCLR6
5DIRCLR5
4DIRCLR4
3DIRCLR3
2DIRCLR2
1DIRCLR1
0DIRCLR0

DIRTGLI/O Port Data Direction Toggle

Address: 0x603
Reset: 0x00
Access: read/write

7DIRTGL7
6DIRTGL6
5DIRTGL5
4DIRTGL4
3DIRTGL3
2DIRTGL2
1DIRTGL1
0DIRTGL0

OUTI/O Port Output

Address: 0x604
Reset: 0x00
Access: read/write

7OUT7
6OUT6
5OUT5
4OUT4
3OUT3
2OUT2
1OUT1
0OUT0

OUTSETI/O Port Output Set

Address: 0x605
Reset: 0x00
Access: read/write

7OUTSET7
6OUTSET6
5OUTSET5
4OUTSET4
3OUTSET3
2OUTSET2
1OUTSET1
0OUTSET0

OUTCLRI/O Port Output Clear

Address: 0x606
Reset: 0x00
Access: read/write

7OUTCLR7
6OUTCLR6
5OUTCLR5
4OUTCLR4
3OUTCLR3
2OUTCLR2
1OUTCLR1
0OUTCLR0

OUTTGLI/O Port Output Toggle

Address: 0x607
Reset: 0x00
Access: read/write

7OUTTGL7
6OUTTGL6
5OUTTGL5
4OUTTGL4
3OUTTGL3
2OUTTGL2
1OUTTGL1
0OUTTGL0

INI/O port Input

Address: 0x608
Reset: 0x00
Access: read/write

7IN7
6IN6
5IN5
4IN4
3IN3
2IN2
1IN1
0IN0

INTCTRLInterrupt Control Register

Address: 0x609
Reset: 0x00
Access: read/write

7–
6–
5–
4–
3INT1LVL1
2INT1LVL0
1INT0LVL1
0INT0LVL0

2 fields

Field	Bits	What it does
INT1LVL	3:2	Port Interrupt 1 Level `0` Interrupt Disabled `1` Low Level `2` Medium Level `3` High Level
INT0LVL	1:0	Port Interrupt 0 Level `0` Interrupt Disabled `1` Low Level `2` Medium Level `3` High Level

INT0MASKPort Interrupt 0 Mask

Address: 0x60A
Reset: 0x00
Access: read/write

7INT0MASK7
6INT0MASK6
5INT0MASK5
4INT0MASK4
3INT0MASK3
2INT0MASK2
1INT0MASK1
0INT0MASK0

INT1MASKPort Interrupt 1 Mask

Address: 0x60B
Reset: 0x00
Access: read/write

7INT1MASK7
6INT1MASK6
5INT1MASK5
4INT1MASK4
3INT1MASK3
2INT1MASK2
1INT1MASK1
0INT1MASK0

INTFLAGSInterrupt Flag Register

Address: 0x60C
Reset: 0x00
Access: read/write

7–
6–
5–
4–
3–
2–
1INT1IF
0INT0IF

2 fields

Field	Bits	What it does
INT1IF	1	Port Interrupt 1 Flag
INT0IF	0	Port Interrupt 0 Flag

PIN0CTRLPin 0 Control Register

Address: 0x610
Reset: 0x00
Access: read/write

7SRLEN
6INVEN
5OPC2
4OPC1
3OPC0
2ISC2
1ISC1
0ISC0

4 fields

Field	Bits	What it does
SRLEN	7	Slew Rate Enable
INVEN	6	Inverted I/O Enable
OPC	5:3	Output/Pull Configuration `0` Totempole `1` Totempole w/ Bus keeper on Input and Output `2` Totempole w/ Pull-down on Input `3` Totempole w/ Pull-up on Input `4` Wired OR `5` Wired AND `6` Wired OR w/ Pull-down `7` Wired AND w/ Pull-up
ISC	2:0	Input/Sense Configuration `0` Sense Both Edges `1` Sense Rising Edge `2` Sense Falling Edge `3` Sense Level (Transparent For Events) `7` Disable Digital Input Buffer

PIN1CTRLPin 1 Control Register

Address: 0x611
Reset: 0x00
Access: read/write

7SRLEN
6INVEN
5OPC2
4OPC1
3OPC0
2ISC2
1ISC1
0ISC0

4 fields

Field	Bits	What it does
SRLEN	7	Slew Rate Enable
INVEN	6	Inverted I/O Enable
OPC	5:3	Output/Pull Configuration `0` Totempole `1` Totempole w/ Bus keeper on Input and Output `2` Totempole w/ Pull-down on Input `3` Totempole w/ Pull-up on Input `4` Wired OR `5` Wired AND `6` Wired OR w/ Pull-down `7` Wired AND w/ Pull-up
ISC	2:0	Input/Sense Configuration `0` Sense Both Edges `1` Sense Rising Edge `2` Sense Falling Edge `3` Sense Level (Transparent For Events) `7` Disable Digital Input Buffer

PIN2CTRLPin 2 Control Register

Address: 0x612
Reset: 0x00
Access: read/write

7SRLEN
6INVEN
5OPC2
4OPC1
3OPC0
2ISC2
1ISC1
0ISC0

4 fields

Field	Bits	What it does
SRLEN	7	Slew Rate Enable
INVEN	6	Inverted I/O Enable
OPC	5:3	Output/Pull Configuration `0` Totempole `1` Totempole w/ Bus keeper on Input and Output `2` Totempole w/ Pull-down on Input `3` Totempole w/ Pull-up on Input `4` Wired OR `5` Wired AND `6` Wired OR w/ Pull-down `7` Wired AND w/ Pull-up
ISC	2:0	Input/Sense Configuration `0` Sense Both Edges `1` Sense Rising Edge `2` Sense Falling Edge `3` Sense Level (Transparent For Events) `7` Disable Digital Input Buffer

PIN3CTRLPin 3 Control Register

Address: 0x613
Reset: 0x00
Access: read/write

7SRLEN
6INVEN
5OPC2
4OPC1
3OPC0
2ISC2
1ISC1
0ISC0

4 fields

Field	Bits	What it does
SRLEN	7	Slew Rate Enable
INVEN	6	Inverted I/O Enable
OPC	5:3	Output/Pull Configuration `0` Totempole `1` Totempole w/ Bus keeper on Input and Output `2` Totempole w/ Pull-down on Input `3` Totempole w/ Pull-up on Input `4` Wired OR `5` Wired AND `6` Wired OR w/ Pull-down `7` Wired AND w/ Pull-up
ISC	2:0	Input/Sense Configuration `0` Sense Both Edges `1` Sense Rising Edge `2` Sense Falling Edge `3` Sense Level (Transparent For Events) `7` Disable Digital Input Buffer

PIN4CTRLPin 4 Control Register

Address: 0x614
Reset: 0x00
Access: read/write

7SRLEN
6INVEN
5OPC2
4OPC1
3OPC0
2ISC2
1ISC1
0ISC0

4 fields

Field	Bits	What it does
SRLEN	7	Slew Rate Enable
INVEN	6	Inverted I/O Enable
OPC	5:3	Output/Pull Configuration `0` Totempole `1` Totempole w/ Bus keeper on Input and Output `2` Totempole w/ Pull-down on Input `3` Totempole w/ Pull-up on Input `4` Wired OR `5` Wired AND `6` Wired OR w/ Pull-down `7` Wired AND w/ Pull-up
ISC	2:0	Input/Sense Configuration `0` Sense Both Edges `1` Sense Rising Edge `2` Sense Falling Edge `3` Sense Level (Transparent For Events) `7` Disable Digital Input Buffer

PIN5CTRLPin 5 Control Register

Address: 0x615
Reset: 0x00
Access: read/write

7SRLEN
6INVEN
5OPC2
4OPC1
3OPC0
2ISC2
1ISC1
0ISC0

4 fields

Field	Bits	What it does
SRLEN	7	Slew Rate Enable
INVEN	6	Inverted I/O Enable
OPC	5:3	Output/Pull Configuration `0` Totempole `1` Totempole w/ Bus keeper on Input and Output `2` Totempole w/ Pull-down on Input `3` Totempole w/ Pull-up on Input `4` Wired OR `5` Wired AND `6` Wired OR w/ Pull-down `7` Wired AND w/ Pull-up
ISC	2:0	Input/Sense Configuration `0` Sense Both Edges `1` Sense Rising Edge `2` Sense Falling Edge `3` Sense Level (Transparent For Events) `7` Disable Digital Input Buffer

PIN6CTRLPin 6 Control Register

Address: 0x616
Reset: 0x00
Access: read/write

7SRLEN
6INVEN
5OPC2
4OPC1
3OPC0
2ISC2
1ISC1
0ISC0

4 fields

Field	Bits	What it does
SRLEN	7	Slew Rate Enable
INVEN	6	Inverted I/O Enable
OPC	5:3	Output/Pull Configuration `0` Totempole `1` Totempole w/ Bus keeper on Input and Output `2` Totempole w/ Pull-down on Input `3` Totempole w/ Pull-up on Input `4` Wired OR `5` Wired AND `6` Wired OR w/ Pull-down `7` Wired AND w/ Pull-up
ISC	2:0	Input/Sense Configuration `0` Sense Both Edges `1` Sense Rising Edge `2` Sense Falling Edge `3` Sense Level (Transparent For Events) `7` Disable Digital Input Buffer

PIN7CTRLPin 7 Control Register

Address: 0x617
Reset: 0x00
Access: read/write

7SRLEN
6INVEN
5OPC2
4OPC1
3OPC0
2ISC2
1ISC1
0ISC0

4 fields

Field	Bits	What it does
SRLEN	7	Slew Rate Enable
INVEN	6	Inverted I/O Enable
OPC	5:3	Output/Pull Configuration `0` Totempole `1` Totempole w/ Bus keeper on Input and Output `2` Totempole w/ Pull-down on Input `3` Totempole w/ Pull-up on Input `4` Wired OR `5` Wired AND `6` Wired OR w/ Pull-down `7` Wired AND w/ Pull-up
ISC	2:0	Input/Sense Configuration `0` Sense Both Edges `1` Sense Rising Edge `2` Sense Falling Edge `3` Sense Level (Transparent For Events) `7` Disable Digital Input Buffer