SAM3SD8C Atmel Corporation, SAM3SD8C Datasheet - Page 957

• Manufacturer Part Number: SAM3SD8C
• Manufacturer: Atmel Corporation

Figure 36-3. Example of USB V2.0 Full-speed Communication Control
Figure 36-4.
The Control Transfer endpoint EP0 is always used when a USB device is first configured (USB v. 2.0 specifications).
36.6.1.1
Table 36-4.
36.6.1.2
11090A–ATARM–10-Feb-12
11090A–ATARM–10-Feb-12
Transfer
Control
Isochronous
Interrupt
Bulk
Software Client 1
USB V2.0 Full-speed Transfer Types
USB Bus Transactions
USB Communication Flow
Unidirectional
Unidirectional
Unidirectional
Bidirectional
Direction
USB Host V2.0
A communication flow is carried over one of four transfer types defined by the USB device.
Each transfer results in one or more transactions over the USB bus. There are three kinds of
transactions flowing across the bus in packets:
1. Setup Transaction
2. Data IN Transaction
3. Data OUT Transaction
Data Flow: Control Transfer
Data Flow: Bulk In Transfer
Data Flow: Bulk Out Transfer
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
Supported Endpoint Size
8, 16, 32, 64
8, 16, 32, 64
USB Device endpoint configuration requires that
in the first instance Control Transfer must be EP0.
512
≤ 64
EP0
EP4
EP5
EP0
EP1
EP2
Error Detection
USB Device 2.0
Block 1
USB Device 2.0
Block 2
Yes
Yes
Yes
Yes
SAM3S8/SD8
SAM3S8/SD8
Automatic
Retrying
Yes
Yes
No
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