ATSAM3U-EK Atmel, ATSAM3U-EK Datasheet - Page 957

• 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

Figure 39-9. Data IN Followed By Status OUT Transfer at the End of a Control Transfer
Note:
Figure 39-10. Data OUT Followed by Status IN Transfer
Note:
6430D–ATARM–25-Mar-11
6430D–ATARM–25-Mar-11
USB Bus
Packets
RX_BK_RDY
(UDPHS_EPTSTAx)
TX_COMPLT
(UDPHS_EPTSTAx)
A NAK handshake is always generated at the first status stage token.
Before proceeding to the status stage, the software should determine that there is no risk of extra data from the host (data
stage). If not certain (non-predictable data stage length), then the software should wait for a NAK-IN interrupt before proceeding
to the status stage. This precaution should be taken to avoid collision in the FIFO.
Token IN
USB Bus
Packets
RX_BK_RDY
(UDPHS_EPTSTAx)
TX_PK_RDY
(UDPHS_EPTSTAx)
Device Sends the Last
Data Payload to Host
Data IN
Set by Hardware
Token OUT
Host Sends the Last
Data Payload to the Device
Set by Hardware
ACK
Data OUT
Set by Firmware
Token OUT
Device Sends a
Status OUT to Host
Cleared by Firmware
Interrupt Pending
ACK
Data OUT (ZLP)
Token IN
Device Sends a Status IN
to the Host
Cleared by Firmware
Data IN
ACK
Token OUT
ACK
Set by Hardware
Clear by Hardware
Data OUT (ZLP)
SAM3U Series
SAM3U Series
Cleared by Firmware
Interrupt
Pending
ACK
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