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12-38 Intel® PXA26x Processor Family Developer’s Manual
Universal Serial Bus Device Controller
12.6.8.1 Interrupt Mask Endpoint x (IMx), Where x is 0 through 7
The UICR0[IMx] bit is used to mask or enable the corresponding endpoint interrupt request,
USIR0[IRx]. When the mask bit is set, the interrupt is masked and the corresponding bit in the
USIR0 register is not allowed to be set. When the mask bit is cleared and an interruptible condition
occurs in the endpoint, the appropriate interrupt bit is set. Programming the mask bit to a 1 does not
affect the current state of the interrupt bit. It only blocks future zero to one transitions of the
interrupt bit.
12.6.9 UDC Interrupt Control Register 1 (UICR1)
The UICR1 contains 8 control bits to enable/disable interrupt service requests from endpoints 8 –
15. The UICR1 bits are reset to 1 so interrupts are not generated on initial system reset.
Table 12-19. UDC Interrupt Control Register 0
0h 4060 0050 UICR0 Read/Write
Bit
31:8 7 6 5 4 3 2 1 0
Reserved IM7 IM6 IM5 IM4 IM3 IM2 IM1 IM0
Rese
t
X 1 1 1 1 1 1 1 1
Bits Name Description
0IM0
INTERRUPT MASK FOR ENDPOINT 0:
0 – Endpoint zero interrupt enabled
1 – Endpoint zero interrupt disabled
1IM1
INTERRUPT MASK FOR ENDPOINT 1:
0 – Transmit interrupt enabled
1 – Transmit interrupt disabled
2IM2
INTERRUPT MASK FOR ENDPOINT 2:
0 – Receive interrupt enabled
1 – Receive interrupt disabled
3IM3
INTERRUPT MASK FOR ENDPOINT 3:
0 – Transmit interrupt enabled
1 – Transmit interrupt disabled
4IM4
INTERRUPT MASK FOR ENDPOINT 4:
0 – Receive Interrupt enabled
1 – Receive Interrupt disabled
5IM5
INTERRUPT MASK FOR ENDPOINT 5:
0 – Transmit interrupt enabled
1 – Transmit interrupt disabled
6IM6
INTERRUPT MASK FOR ENDPOINT 6:
0 – Transmit interrupt enabled
1 – Transmit interrupt disabled
7IM7
INTERRUPT MASK FOR ENDPOINT 7:
0 – Receive interrupt enabled
1 – Receive interrupt disabled
31:8 — Reserved for future use