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ATSAM4S-XPLD
964
SAM4S [DATASHEET]
11100E–ATARM–24-Jul-13
• EPTYPE[2:0]: Endpoint Type
Read-Write
• 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
microcontroller can load the data from the FIFO by reading RXBYTECENT bytes in the UDP_FDRx register.
microcontroller can load the data from the FIFO by reading RXBYTECENT bytes in the UDP_FDRx register.
Value
Name
Description
000
CTRL
Control
001
ISO_OUT
Isochronous OUT
101
ISO_IN
Isochronous IN
010
BULK_OUT
Bulk OUT
110
BULK_IN
Bulk IN
011
INT_OUT
Interrupt OUT
111
INT_IN
Interrupt IN