Datasheet

 2017 Microchip Technology Inc. DS60001516A-page 679
SAM9G20
36.6.7 UDP Interrupt Status Register
Name:UDP_ISR
Access:Read-only
EP0INT: Endpoint 0 Interrupt Status
EP1INT: Endpoint 1 Interrupt Status
EP2INT: Endpoint 2 Interrupt Status
EP3INT: Endpoint 3 Interrupt Status
EP4INT: Endpoint 4 Interrupt Status
EP5INT: Endpoint 5 Interrupt Status
0: No Endpoint0 Interrupt pending.
1: Endpoint0 Interrupt has been raised.
Several signals can generate this interrupt. The reason can be found by reading UDP_CSR0:
RXSETUP set to 1
RX_DATA_BK0 set to 1
RX_DATA_BK1 set to 1
TXCOMP set to 1
STALLSENT set to 1
EP0INT is a sticky bit. Interrupt remains valid until EP0INT is cleared by writing in the corresponding UDP_CSR0 bit.
RXSUSP: UDP Suspend Interrupt Status
0: No UDP Suspend Interrupt pending.
1: UDP Suspend Interrupt has been raised.
The USB device sets this bit when it detects no activity for 3ms. The USB device enters Suspend mode.
RXRSM: UDP Resume Interrupt Status
0: No UDP Resume Interrupt pending.
1:UDP Resume Interrupt has been raised.
The USB device sets this bit when a UDP resume signal is detected at its port.
After reset, the state of this bit is undefined, the application must clear this bit by setting the RXRSM flag in the UDP_ICR.
EXTRSM: UDP External Resume Interrupt Status
0: No UDP External Resume Interrupt pending.
1: UDP External Resume Interrupt has been raised.
31 30 29 28 27 26 25 24
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23 22 21 20 19 18 17 16
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15 14 13 12 11 10 9 8
– – WAKEUP ENDBUSRES SOFINT EXTRSM
RXRSM RXSUSP
76543210
– – EP5INT EP4INT EP3INT EP2INT EP1INT EP0INT