Atmel ARM-Based Evaluation Kit AT91SAM9N12-EK AT91SAM9N12-EK Data Sheet

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SAM9N12/SAM9CN11/SAM9CN12 [DATASHEET]

11063K–ATARM–05-Nov-13

Some endpoints have dual-banks whereas some endpoints have only one bank. The procedure to cancel transmission
data held in these banks is described below.

To see the organization of dual-bank availability refer to 

.

There are two possibilities: In one case, TXPKTRDY field in UDP_CSR has already been set. In the other instance,
TXPKTRDY is not set.



TXPKTRDY is not set:



Reset the endpoint to clear the FIFO (pointers). (See, 



TXPKTRDY has already been set:



Clear TXPKTRDY so that no packet is ready to be sent



Reset the endpoint to clear the FIFO (pointers). (See, 

There are two possibilities: In one case, TXPKTRDY field in UDP_CSR has already been set. In the other instance,
TXPKTRDY is not set.



TXPKTRDY is not set:



Reset the endpoint to clear the FIFO (pointers). (See, 



TXPKTRDY has already been set:



Clear TXPKTRDY and read it back until actually read at 0.



Set TXPKTRDY and read it back until actually read at 1.



Clear TXPKTRDY so that no packet is ready to be sent.



Reset the endpoint to clear the FIFO (pointers). (See,