AT91SAM9G10-EK Atmel, AT91SAM9G10-EK Datasheet - Page 717

• Manufacturer Part Number: AT91SAM9G10-EK
• Description: KIT DEV FOR SAM9G10 ARM
• Manufacturer: Atmel
• Type: MCUr

Specifications of AT91SAM9G10-EK

• Contents: Board, Cables, Power Supply
• Silicon Manufacturer: Atmel
• Core Architecture: AVR
• Kit Contents: Board
• Svhc: No SVHC (15-Dec-2010)
• Mcu Supported Families: AT91SAM9G10, ARM926EJ-S
• Tool / Board Applications: Microcontroller
• Rohs Compliant: Yes
• For Use With/related Products: *
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant

42.2.12
42.2.12.1
6462A–ATARM–03-Jun-09
UDP
UDP: Bad Data in the First IN Data Stage
Consequence: If the Device does not recognize the resume (<20 ms) event, then the Device will
remain in suspend state.
Host stack can do a port resume after it sets the HcControl.HCFS to USBOPERATIONAL.
All or part of the data of the first IN data Stage are not transmitted.It may then be a Zero Length
Packet. The CRC is correct. So the HOST may only see that the size of the received data does
not match the requested length. But even if performed again, the control transfer will probably
fail.
These Control transfers are mainly used at device configuration. After clearing RXSETUP, the
software needs to compute the setup transaction request before writing data into the FIFO if
needed. This time is generally greater than the minimum safe delay required above. If not, a
software wait loop after RXSETUP clear may be added at minimum cost.
Problem Fix/Workaround
Problem Fix/Workaround
AT91SAM9G10
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