at91rm3400 ATMEL Corporation, at91rm3400 Datasheet - Page 399

• Manufacturer Part Number: at91rm3400
• Description: Atmel Advanced At91 Arm Microcontroller
• Manufacturer: ATMEL Corporation

Functional Description
USB V2.0 Full-
speed Introduction
Figure 163. Example of USB V2.0 Full-speed Communication Control
USB V2.0 Full-speed Transfer Types
A communication flow is carried over one of four transfer types defined by the USB device.
Table 69. USB Communication Flow
1790A–ATARM–11/03
Transfer
Control
Isochronous
Interrupt
Bulk
Software Client 1
Data Flow: Control Transfer
Data Flow: Bulk In Transfer
Data Flow: Bulk Out Transfer
USB Host V2.0
Uni-directional
Uni-directional
Uni-directional
Bi-directional
Direction
The USB V2.0 full-speed provides communication services between host and attached USB
devices. Each device is offered with a collection of communication flows (pipes) associated
with each endpoint. Software on the host communicates with an USB device through a set of
communication flows.
Software Client 2
Not guaranteed
Not guaranteed
Not guaranteed
Guaranteed
Bandwidth
Data Flow: Control Transfer
Data Flow: Isochronous In Transfer
Data Flow: Isochronous Out Transfer
Endpoint Size
8, 16, 32, 64
8, 16, 32, 64
1 - 1023
64
EP0
EP4
EP5
EP0
EP1
EP2
Error Detection
Yes
Yes
Yes
Yes
USB Device 2.0
Block 1
USB Device 2.0
Block 2
AT91RM3400
Automatic
Retrying
Yes
Yes
No
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