AT91RM3400-DK Atmel, AT91RM3400-DK Datasheet - Page 400
AT91RM3400-DK
Manufacturer Part Number
AT91RM3400-DK
Description
KIT DEV FOR AT91RM3400
Manufacturer
Atmel
Series
AT91SAM Smart ARMr
Type
MCUr
Datasheets
1.AT91RM3400-DK.pdf
(461 pages)
2.AT91RM3400-DK.pdf
(2 pages)
3.AT91RM3400-DK.pdf
(25 pages)
Specifications of AT91RM3400-DK
Contents
Evaluation Board, Software and Documentation
Processor To Be Evaluated
AT91RM3400
Data Bus Width
32 bit
Interface Type
RS-232, USB
For Use With/related Products
AT91RM3400
Lead Free Status / RoHS Status
Contains lead / RoHS non-compliant
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USB Bus Transactions
USB Transfer Event
Definitions
400
AT91RM3400
Each transfer results in one or more transactions over the USB bus. There are five kinds of
transactions flowing across the bus in packets:
1. Setup Transaction
2. Data IN Transaction
3. Data OUT Transaction
4. Status IN Transaction
5. Status OUT Transaction
As shown in Table 70, transfers are sequential events carried out on the USB bus.
Table 70. USB Transfer Events
Notes:
Control Transfers
Interrupt IN Transfer
(device toward host)
Interrupt OUT Transfer
(host toward device)
Isochronous IN Transfer
(device toward host)
Isochronous OUT Transfer
(host toward device)
Bulk IN Transfer
(device toward host)
Bulk OUT Transfer
(host toward device)
1. Control transfer must use endpoints with no ping-pong attributes.
2. Isochronous transfers must use endpoints with ping-pong attributes.
3. Control transfers can be aborted using a stall handshake.
(1) (3)
(2)
(2)
•
•
•
•
•
•
•
•
•
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 OUT transaction > Data OUT transaction
Data IN transaction > Data IN transaction
Data OUT transaction > Data OUT transaction
Data IN transaction > Data IN transaction
Data OUT transaction > Data OUT transaction
1790A–ATARM–11/03
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