AT91SAM9263_1 Datasheet, PDF (859/1110 Pages) ATMEL Corporation – AT91 ARM Thumb Microcontrollers

AT91SAM9263 Preliminary
43. USB Device Port (UDP)
43.1 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.
Table 43-1. USB Endpoint Description
Endpoint Number
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
256
Bulk/Iso/Interrupt
5
EP5
Yes
256
Bulk/Iso/Interrupt
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 proces-
sor by raising an interrupt. Depending on the product, an external signal can be used to send a
wake up to the USB host controller.
6249H–ATARM–27-Jul-09
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