Datasheet
32.8.5.8 Host Interrupt Flag Status and Clear
Name: INTFLAG
Offset: 0x1C
Reset: 0x0000
Property: -
Bit 15 14 13 12 11 10 9 8
DDISC DCONN
Access
R/W R/W
Reset 0 0
Bit 7 6 5 4 3 2 1 0
RAMACER UPRSM DNRSM WAKEUP RST HSOF
Access
R/W R/W R/W R/W R/W R/W
Reset 0 0 0 0 0 0
Bit 9 – DDISC Device Disconnection Interrupt Flag
This flag is cleared by writing a one to the flag.
This flag is set when the device has been removed from the USB Bus and will generate an interrupt if
INTENCLR/SET.DDISC is one.
Writing a zero to this bit has no effect.
Writing a one to this bit clears the DDISC Interrupt Flag.
Bit 8 – DCONN Device Connection Interrupt Flag
This flag is cleared by writing a one to the flag.
This flag is set when a new device has been connected to the USB BUS and will generate an interrupt if
INTENCLR/SET.DCONN is one.
Writing a zero to this bit has no effect.
Writing a one to this bit clears the DCONN Interrupt Flag.
Bit 7 – RAMACER RAM Access Interrupt Flag
This flag is cleared by writing a one to the flag.
This flag is set when a RAM access error occurs during an OUT stage and will generate an interrupt if
INTENCLR/SET.RAMACER is one.
Writing a zero to this bit has no effect.
Bit 6 – UPRSM Upstream Resume from the Device Interrupt Flag
This flag is cleared by writing a one to the flag.
This flag is set when the USB has received an Upstream Resume signal from the Device and will
generate an interrupt if INTENCLR/SET.UPRSM is one.
Writing a zero to this bit has no effect.
SAM D21 Family
USB – Universal Serial Bus
© 2018 Microchip Technology Inc.
Datasheet Complete
DS40001882D-page 866