Atmel Xplained Pro Evaluation Kit for the ATSAMD21J18A Microcontroller ATSAMD21-XPRO ATSAMD21-XPRO Data Sheet
Product codes
ATSAMD21-XPRO
777
Atmel | SMART SAM D21 [DATASHEET]
Atmel-42181C–SAM-D21_Datasheet–07/2014
This flag is set when the USB detects a valid “End of Resume” signal initiated by the host and will generate an
interrupt if INTENCLR/SET.EORSM is one.
Writing a zero to this bit has no effect.
interrupt if INTENCLR/SET.EORSM is one.
Writing a zero to this bit has no effect.
z
Bit 4 – WAKEUP: Wake Up Interrupt Flag
This flag is cleared by writing a one to the flag.
This flag is set when the USB is reactivated by a filtered non-idle signal from the lines and will generate an inter-
rupt if INTENCLR/SET.WAKEUP is one.
Writing a zero to this bit has no effect.
This flag is cleared by writing a one to the flag.
This flag is set when the USB is reactivated by a filtered non-idle signal from the lines and will generate an inter-
rupt if INTENCLR/SET.WAKEUP is one.
Writing a zero to this bit has no effect.
z
Bit 3 – EORST: End of Reset Interrupt Flag
This flag is cleared by writing a one to the flag.
This flag is set when a USB “End of Reset” has been detected and will generate an interrupt if INTEN-
CLR/SET.EORST is one.
Writing a zero to this bit has no effect.
This flag is cleared by writing a one to the flag.
This flag is set when a USB “End of Reset” has been detected and will generate an interrupt if INTEN-
CLR/SET.EORST is one.
Writing a zero to this bit has no effect.
z
Bit 2 – SOF: Start-of-Frame Interrupt Flag
This flag is cleared by writing a one to the flag.
This flag is set when a USB “Start-of-Frame” has been detected (every 1 ms) and will generate an interrupt if
INTENCLR/SET.SOF is one.
The FNUM is updated.
Writing a zero to this bit has no effect.
This flag is cleared by writing a one to the flag.
This flag is set when a USB “Start-of-Frame” has been detected (every 1 ms) and will generate an interrupt if
INTENCLR/SET.SOF is one.
The FNUM is updated.
Writing a zero to this bit has no effect.
z
Bit 1 – Reserved
This bit is unused and reserved for future use. For compatibility with future devices, always write this bit to zero
when this register is written. This bit will always return zero when read.
This bit is unused and reserved for future use. For compatibility with future devices, always write this bit to zero
when this register is written. This bit will always return zero when read.
z
Bit 0 – SUSPEND: Suspend Interrupt Flag
This flag is cleared by writing a one to the flag.
This flag is set when a USB “Suspend” idle state has been detected for 3 frame periods (J state for 3 ms) and will
generate an interrupt if INTENCLR/SET.SUSPEND is one.
Writing a zero to this bit has no effect.
This flag is cleared by writing a one to the flag.
This flag is set when a USB “Suspend” idle state has been detected for 3 frame periods (J state for 3 ms) and will
generate an interrupt if INTENCLR/SET.SUSPEND is one.
Writing a zero to this bit has no effect.