Datasheet

SAM9261 [DATASHEET]
Atmel-6062O-ATARM-SAM9261-Datasheet_21-Jun-16
586
36. USB Device Port (UDP)
36.1 Overview
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 wakeup to the USB host controller.
36.2 Embedded Characteristics
 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
 Compatible with Embedded ARM7TDMI
®
and ARM9TDMI
®
Processor
 Can be Directly Connected to the Atmel Implementation of the AMBA Peripheral Bus (APB)
Table 36-1. USB Endpoint Description
Endpoint Number Mnemonic Dual-Bank
(1)
Max. Endpoint Size Endpoint Type
0 EP0 No 8 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 256 Bulk/Iso/Interrupt
5 EP5 Yes 256 Bulk/Iso/Interrupt