Datasheet

32.8.2.7 Device Interrupt Flag Status and Clear
Name: INTFLAG
Offset: 0x01C
Reset: 0x0000
Property: -
Bit 15 14 13 12 11 10 9 8
LPMSUSP LPMNYET
Access
R/W R/W
Reset 0 0
Bit 7 6 5 4 3 2 1 0
RAMACER UPRSM EORSM WAKEUP EORST SOF SUSPEND
Access
R/W R/W R/W R/W R/W R/W R/W
Reset 0 0 0 0 0 0 0
Bit 9 – LPMSUSP Link Power Management Suspend Interrupt Flag
This flag is cleared by writing a one to the flag.
This flag is set when the USB module acknowledge a Link Power Management Transaction (ACK
handshake) and has entered the Suspended state and will generate an interrupt if INTENCLR/
SET.LPMSUSP is one.
Writing a zero to this bit has no effect.
Writing a one to this bit clears the LPMSUSP Interrupt Flag.
Bit 8 – LPMNYET Link Power Management Not Yet Interrupt Flag
This flag is cleared by writing a one to the flag.
This flag is set when the USB module acknowledges a Link Power Management Transaction (handshake
is NYET) and will generate an interrupt if INTENCLR/SET.LPMNYET is one.
Writing a zero to this bit has no effect.
Writing a one to this bit clears the LPMNYET 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 underflow error occurs during IN data stage. This bit will generate an
interrupt if INTENCLR/SET.RAMACER is one.
Writing a zero to this bit has no effect.
Bit 6 – UPRSM Upstream Resume Interrupt Flag
This flag is cleared by writing a one to the flag.
This flag is set when the USB sends a resume signal called “Upstream Resume” 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 837