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

516

SAM9N12/SAM9CN11/SAM9CN12 [DATASHEET]

11063K–ATARM–05-Nov-13

The USB Device Port (UDP) is compliant with the Universal Serial Bus (USB) V2.0 full-speed device specification. 

Each endpoint can be configured in one of several USB transfer types. It can be associated with one or two banks of
a dual-port RAM used to store the current data payload. If two banks are used, one DPR bank is read or written by
the processor, while the other is read or written by the USB device peripheral. This feature is mandatory for isochronous
endpoints. Thus the device maintains the maximum bandwidth (1M bytes/s) by working with endpoints with two banks
of DPR.

Note:

1. The Dual-Bank function provides two banks for an endpoint. This feature is used for ping-pong mode.

Suspend and resume are automatically detected by the USB device, which notifies the processor by raising an interrupt.
Depending on the product, an external signal can be used to send a wake up to the USB host controller.



USB V2.0 Full-speed Compliant, 12 Mbits per Second



Embedded USB V2.0 Full-speed Transceiver



6 Endpoints



Embedded Dual-port RAM for Endpoints



Suspend/Resume Logic



Ping-pong Mode (2 Memory Banks) for Isochronous and Bulk Endpoints

0

EP0

No

64

Control/Bulk/Interrupt

1

EP1

Yes

64

Bulk/Iso/Interrupt

2

EP2

Yes

 64

Bulk/Iso/Interrupt

3

EP3

No

64

Control/Bulk/Interrupt

4

EP4

Yes

512

Bulk/Iso/Interrupt

5

EP5

Yes

512

Bulk/Iso/Interrupt