Datasheet

SAM4E [DATASHEET]
Atmel-11157D-ATARM-SAM4E16-SAM4E8-Datasheet_12-Jun-14
1148
42. USB Device Port (UDP)
42.1 Description
The USB Device Port (UDP) is compliant with the Universal Serial Bus (USB) 2.0 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 (1 Mbyte/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.
42.2 Embedded Characteristics
 USB 2.0 Full-speed Compliant, 12 Mbit/s
 Embedded USB 2.0 Full-speed Transceiver
 Integrated Pull-up on DDP
 Integrated Pull-down on DDM
 8 Endpoints
 Embedded Dual-port RAM for Endpoints
 Suspend/Resume Logic
 Ping-pong Mode (2 Memory Banks) for Isochronous and Bulk Endpoints
Table 42-1. USB Endpoint Description
Endpoint No. Mnemonic Dual-Bank
(1)
Max. Endpoint Size Endpoint Type
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