Atmel SAM4S-XPLD Atmel ATSAM4S-XPLD ATSAM4S-XPLD Hoja De Datos

 927

SAM4S [DATASHEET]

11100E–ATARM–24-Jul-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 



Embedded 2688-byte dual-port RAM for endpoints 



Eight endpoints 



Endpoint 0: 64bytes 



Endpoint 1 and 2: 64 bytes ping-pong 



Endpoint 3: 64 bytes 



Endpoint 4 and 5: 512 bytes ping-pong 



Endpoint 6 and 7: 64 bytes ping-pong 



Ping-pong Mode (two memory banks) for Isochronous and bulk endpoints 



Suspend/resume logic 



Integrated Pull-up on DDP 



Pull-down resistor on DDM and DDP when disabled

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

6

EP6

Yes

64

Bulk/Iso/Interrupt

7

EP7

Yes

64

Bulk/Iso/Interrupt