ATxmega32C3 USB registers

The 15 registers of USB (USB), from 0x4C0, with their reset value and every field. The ATxmega32C3 has 550 registers in 51 peripherals, one page each.

USB USB

CTRLAControl Register A

Address: 0x4C0
Reset: 0x00
Access: read/write

7ENABLE
6SPEED
5FIFOEN
4STFRNUM
3MAXEP3
2MAXEP2
1MAXEP1
0MAXEP0

5 fields

Field	Bits	What it does
ENABLE	7	USB Enable
SPEED	6	Speed Select
FIFOEN	5	USB FIFO Enable
STFRNUM	4	Store Frame Number Enable
MAXEP	3:0	Maximum Endpoint Addresses

CTRLBControl Register B

Address: 0x4C1
Reset: 0x00
Access: read/write

7–
6–
5–
4PULLRST
3–
2RWAKEUP
1GNACK
0ATTACH

4 fields

Field	Bits	What it does
PULLRST	4	Pull during Reset
RWAKEUP	2	Remote Wake-up
GNACK	1	Global NACK
ATTACH	0	Attach

STATUSStatus Register

Address: 0x4C2
Reset: 0x00
Access: read/write

7–
6–
5–
4–
3URESUME
2RESUME
1SUSPEND
0BUSRST

4 fields

Field	Bits	What it does
URESUME	3	Upstream Resume
RESUME	2	Resume
SUSPEND	1	Bus Suspended
BUSRST	0	Bus Reset

ADDRAddress Register

Address: 0x4C3
Reset: 0x00
Access: read/write

7–
6ADDR6
5ADDR5
4ADDR4
3ADDR3
2ADDR2
1ADDR1
0ADDR0

1 field

Field	Bits	What it does
ADDR	6:0	Device Address

FIFOWPFIFO Write Pointer Register

Address: 0x4C4
Reset: 0x00
Access: read/write

7–
6–
5–
4FIFOWP4
3FIFOWP3
2FIFOWP2
1FIFOWP1
0FIFOWP0

1 field

Field	Bits	What it does
FIFOWP	4:0	FIFO Write Pointer

FIFORPFIFO Read Pointer Register

Address: 0x4C5
Reset: 0x00
Access: read/write

7–
6–
5–
4FIFORP4
3FIFORP3
2FIFORP2
1FIFORP1
0FIFORP0

1 field

Field	Bits	What it does
FIFORP	4:0	FIFO Read Pointer

EPPTREndpoint Configuration Table Pointer

Address: 0x4C6
Reset: 0x0000
Access: read/write
Size: 16-bit

INTCTRLAInterrupt Control Register A

Address: 0x4C8
Reset: 0x00
Access: read/write

7SOFIE
6BUSEVIE
5BUSERRIE
4STALLIE
3–
2–
1INTLVL1
0INTLVL0

5 fields

Field	Bits	What it does
SOFIE	7	Start Of Frame Interrupt Enable
BUSEVIE	6	Bus Event Interrupt Enable
BUSERRIE	5	Bus Error Interrupt Enable
STALLIE	4	STALL Interrupt Enable
INTLVL	1:0	Interrupt Level `0` Interrupt disabled `1` Low level `2` Medium level `3` High level

INTCTRLBInterrupt Control Register B

Address: 0x4C9
Reset: 0x00
Access: read/write

7–
6–
5–
4–
3–
2–
1TRNIE
0SETUPIE

2 fields

Field	Bits	What it does
TRNIE	1	Transaction Complete Interrupt Enable
SETUPIE	0	SETUP Transaction Complete Interrupt Enable

INTFLAGSACLRClear Interrupt Flag Register A

Address: 0x4CA
Reset: 0x00
Access: read/write

7SOFIF
6SUSPENDIF
5RESUMEIF
4RSTIF
3CRCIF
2UNFIF
1OVFIF
0STALLIF

8 fields

Field	Bits	What it does
SOFIF	7	Start Of Frame Interrupt Flag
SUSPENDIF	6	Suspend Interrupt Flag
RESUMEIF	5	Resume Interrupt Flag
RSTIF	4	Reset Interrupt Flag
CRCIF	3	Isochronous CRC Error Interrupt Flag
UNFIF	2	Underflow Interrupt Flag
OVFIF	1	Overflow Interrupt Flag
STALLIF	0	STALL Interrupt Flag

INTFLAGSASETSet Interrupt Flag Register A

Address: 0x4CB
Reset: 0x00
Access: read/write

7SOFIF
6SUSPENDIF
5RESUMEIF
4RSTIF
3CRCIF
2UNFIF
1OVFIF
0STALLIF

8 fields

Field	Bits	What it does
SOFIF	7	Start Of Frame Interrupt Flag
SUSPENDIF	6	Suspend Interrupt Flag
RESUMEIF	5	Resume Interrupt Flag
RSTIF	4	Reset Interrupt Flag
CRCIF	3	Isochronous CRC Error Interrupt Flag
UNFIF	2	Underflow Interrupt Flag
OVFIF	1	Overflow Interrupt Flag
STALLIF	0	STALL Interrupt Flag

INTFLAGSBCLRClear Interrupt Flag Register B

Address: 0x4CC
Reset: 0x00
Access: read/write

7–
6–
5–
4–
3–
2–
1TRNIF
0SETUPIF

2 fields

Field	Bits	What it does
TRNIF	1	Transaction Complete Interrupt Flag
SETUPIF	0	SETUP Transaction Complete Interrupt Flag

INTFLAGSBSETSet Interrupt Flag Register B

Address: 0x4CD
Reset: 0x00
Access: read/write

7–
6–
5–
4–
3–
2–
1TRNIF
0SETUPIF

2 fields

Field	Bits	What it does
TRNIF	1	Transaction Complete Interrupt Flag
SETUPIF	0	SETUP Transaction Complete Interrupt Flag

CAL0Calibration Byte 0

Address: 0x4FA
Reset: 0x00
Access: read/write

7–
6–
5–
4–
3–
2–
1–
0–

CAL1Calibration Byte 1

Address: 0x4FB
Reset: 0x00
Access: read/write

7–
6–
5–
4–
3–
2–
1–
0–