Datasheet

SAM9G20
DS60001516A-page 686  2017 Microchip Technology Inc.
EPTYPE[2:0]: Endpoint Type
DTGLE: Data Toggle
Read-only
0: Identifies DATA0 packet.
1: Identifies DATA1 packet.
Refer to Chapter 8 of the Universal Serial Bus Specification, Rev. 2.0 for more information on DATA0, DATA1 packet definitions.
EPEDS: Endpoint Enable Disable
Read:
0: Endpoint disabled.
1: Endpoint enabled.
Write:
0: Disables endpoint.
1: Enables endpoint.
Control endpoints are always enabled. Reading or writing this field has no effect on control endpoints.
Note: After reset, all endpoints are configured as control endpoints (zero).
RXBYTECNT[10:0]: Number of Bytes Available in the FIFO
Read-only
When the host sends a data packet to the device, the USB device stores the data in the FIFO and notifies the microcontroller. The micro-
controller can load the data from the FIFO by reading RXBYTECENT bytes in the UDP_FDRx register.
Read/Write
000 Control
001 Isochronous OUT
101 Isochronous IN
010 Bulk OUT
110 Bulk IN
011 Interrupt OUT
111 Interrupt IN