ATSAM3U-EK Atmel, ATSAM3U-EK Datasheet - Page 993

• 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

39.7.14
Name:
Address:
Access:
• EPT_ENABL: Endpoint Enable
0 = If cleared, the endpoint is disabled according to the device configuration. Endpoint 0 should always be enabled after a
hardware or UDPHS bus reset and participate in the device configuration.
1 = If set, the endpoint is enabled according to the device configuration.
• AUTO_VALID: Packet Auto-Valid Enabled (Not for CONTROL Endpoints)
Set this bit to automatically validate the current packet and switch to the next bank for both IN and OUT endpoints.
• INTDIS_DMA: Interrupt Disables DMA
If set, when an enabled endpoint-originated interrupt is triggered, the DMA request is disabled regardless of the
UDPHS_IEN register EPT_x bit for this endpoint. Then, the firmware will have to clear or disable the interrupt source or
clear this bit if transfer completion is needed.
6430D–ATARM–25-Mar-11
6430D–ATARM–25-Mar-11
SHRT_PCKT
MDATA_RX
NAK_OUT
For IN Transfer:
If this bit is set, then the UDPHS_EPTSTAx register TX_PK_RDY bit is set automatically when the current bank is full
and at the end of DMA buffer if the UDPHS_DMACONTROLx register END_B_EN bit is set.
The user may still set the UDPHS_EPTSTAx register TX_PK_RDY bit if the current bank is not full, unless the user
wants to send a Zero Length Packet by software.
For OUT Transfer:
If this bit is set, then the UDPHS_EPTSTAx register RX_BK_RDY bit is automatically reset for the current bank when
the last packet byte has been read from the bank FIFO or at the end of DMA buffer if the UDPHS_DMACONTROLx
register END_B_EN bit is set. For example, to truncate a padded data packet when the actual data transfer size is
reached.
The user may still clear the UDPHS_EPTSTAx register RX_BK_RDY bit, for example, after completing a DMA buffer
by software if UDPHS_DMACONTROLx register END_B_EN bit was disabled or in order to cancel the read of the
remaining data bank(s).
31
23
15
–
7
UDPHS Endpoint Control Register
UDPHS_EPTCTLx [x=0..6]
0x400A410C [0], 0x400A412C [1], 0x400A414C [2], 0x400A416C [3], 0x400A418C [4], 0x400A41AC [5],
0x400A41CC [6]
Read-only
ERR_FLUSH
DATAX_RX
NAK_IN/
30
22
14
–
–
6
ERR_CRISO/
ERR_NBTRA
STALL_SNT/
29
21
13
–
–
5
–
ERR_FL_ISO
RX_SETUP/
NYET_DIS
28
20
12
–
–
4
TX_PK_RDY/
ERR_TRANS
INTDIS_DMA
27
19
11
–
–
3
BUSY_BANK
TX_COMPLT
26
18
10
–
2
–
AUTO_VALID
RX_BK_RDY
SAM3U Series
SAM3U Series
25
17
–
–
9
1
ERR_OVFLW
EPT_ENABL
24
16
–
–
8
0
993
993