ATSAM3U-EK Atmel, ATSAM3U-EK Datasheet - Page 947

• Manufacturer Part Number: ATSAM3U-EK
• Description: KIT EVAL FOR AT91SAM3U CORTEX
• Manufacturer: Atmel
• Type: MCUr

Specifications of ATSAM3U-EK

• Contents: Board
• Processor To Be Evaluated: SAM3U
• Data Bus Width: 32 bit
• Interface Type: RS-232, USB
• Operating Supply Voltage: 3 V
• Silicon Manufacturer: Atmel
• Core Architecture: ARM
• Core Sub-architecture: Cortex - M3
• Silicon Core Number: SAM3U4E
• Silicon Family Name: SAM3U
• Kit Contents: Board CD Docs
• Rohs Compliant: Yes
• For Use With/related Products: AT91SAM3U
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

39.6.2
Table 39-3.
39.6.3
Table 39-4.
Notes:
6430D–ATARM–25-Mar-11
6430D–ATARM–25-Mar-11
Transfer
Control
Isochronous
Interrupt
Bulk
CONTROL
(bidirectional)
IN
(device toward host)
OUT
(host toward device)
1. Control transfer must use endpoints with one bank and can be aborted using a stall handshake.
2. Isochronous transfers must use endpoints configured with two or three banks.
USB V2.0 High Speed Transfer Types
USB Transfer Event Definitions
USB Communication Flow
USB Transfer Events
Control Transfers
Bulk IN Transfer
Interrupt IN Transfer
Isochronous IN Transfer
Bulk OUT Transfer
Interrupt OUT Transfer
Isochronous OUT Transfer
A communication flow is carried over one of four transfer types defined by the USB device.
A device provides several logical communication pipes with the host. To each logical pipe is
associated an endpoint. Transfer through a pipe belongs to one of the four transfer types:
As indicated below, transfers are sequential events carried out on the USB bus.
Endpoints must be configured according to the transfer type they handle.
A transfer is composed of one or several transactions;
An endpoint handles all transactions related to the type of transfer for which it has been
configured.
Unidirectional
Unidirectional
Unidirectional
Bidirectional
• Control Transfers: Used to configure a device at attach time and can be used for other device-
• Bulk Data Transfers: Generated or consumed in relatively large burst quantities and have
• Interrupt Data Transfers: Used for timely but reliable delivery of data, for example, characters
• Isochronous Data Transfers: Occupy a prenegotiated amount of USB bandwidth with a
Direction
specific purposes, including control of other pipes on the device.
wide dynamic latitude in transmission constraints.
or coordinates with human-perceptible echo or feedback response characteristics.
prenegotiated delivery latency. (Also called streaming real time transfers.)
(1)
(2)
(2)
Not guaranteed
Not guaranteed
Not guaranteed
Guaranteed
Bandwidth
• Setup transaction → Data IN transactions → Status OUT transaction
• Setup transaction → Data OUT transactions → Status IN transaction
• Setup transaction → Status IN transaction
• Data IN transaction → Data IN transaction
• Data IN transaction → Data IN transaction
• Data IN transaction → Data IN transaction
• Data OUT transaction → Data OUT transaction
• Data OUT transaction → Data OUT transaction
• Data OUT transaction → Data OUT transaction
Endpoint Size
8, 16, 32, 64
8-1024
8-1024
8-512
Error Detection
SAM3U Series
SAM3U Series
Yes
Yes
Yes
Yes
Automatic
Retrying
Yes
Yes
No
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