Datasheet

SAM9G20
DS60001516A-page 682  2017 Microchip Technology Inc.
36.6.9 UDP Reset Endpoint Register
Name:UDP_RST_EP
Access:Read/Write
EP0: Reset Endpoint 0
EP1: Reset Endpoint 1
EP2: Reset Endpoint 2
EP3: Reset Endpoint 3
EP4: Reset Endpoint 4
EP5: Reset Endpoint 5
This flag is used to reset the FIFO associated with the endpoint and the bit RXBYTECOUNT in the register UDP_CSRx.It also resets the
data toggle to DATA0. It is useful after removing a HALT condition on a BULK endpoint. Refer to Chapter 5.8.5 in the USB Serial Bus
Specification, Rev.2.0.
Warning: This flag must be cleared at the end of the reset. It does not clear UDP_CSRx flags.
0: No reset.
1: Forces the corresponding endpoint FIF0 pointers to 0, therefore RXBYTECNT field is read at 0 in UDP_CSRx register.
Resetting the endpoint is a two-step operation:
1. Set the corresponding EPx field.
2. Clear the corresponding EPx field.
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76543210
– – EP5 EP4 EP3 EP2 EP1 EP0