Datasheet

1013
SAM4S Series [DATASHEET]
11100F–ATARM–29-Jan-14
40.7.7 UDP Interrupt Status Register
Name: UDP_ISR
Address: 0x4003401C
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
 EP6INT: Endpoint 6 Interrupt Status
 EP7INT: Endpoint 7Interrupt 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 3 ms. The USB device enters Suspend mode.
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
EP7INT EP6INT EP5INT EP4INT EP3INT EP2INT EP1INT EP0INT