SAM3U2C Atmel Corporation, SAM3U2C Datasheet - Page 973

• Manufacturer Part Number: SAM3U2C
• Manufacturer: Atmel Corporation

Specifications of SAM3U2C

• Flash (kbytes): 128 Kbytes
• Pin Count: 100
• Max. Operating Frequency: 96 MHz
• Cpu: Cortex-M3
• # Of Touch Channels: 28
• Hardware Qtouch Acquisition: No
• Max I/o Pins: 57
• Ext Interrupts: 57
• Usb Transceiver: 1
• Quadrature Decoder Channels: 1
• Usb Speed: Hi-Speed
• Usb Interface: Device
• Spi: 4
• Twi (i2c): 1
• Uart: 4
• Ssc: 1
• Sd / Emmc: 1
• Graphic Lcd: No
• Video Decoder: No
• Camera Interface: No
• Adc Channels: 8
• Adc Resolution (bits): 12
• Adc Speed (ksps): 384
• Resistive Touch Screen: No
• Temp. Sensor: No
• Crypto Engine: No
• Sram (kbytes): 36
• Self Program Memory: YES
• External Bus Interface: 1
• Dram Memory: No
• Nand Interface: Yes
• Picopower: No
• Temp. Range (deg C): -40 to 85
• I/o Supply Class: 1.8/3.3
• Operating Voltage (vcc): 1.62 to 3.6
• Fpu: No
• Mpu / Mmu: Yes / No
• Timers: 3
• Output Compare Channels: 3
• Input Capture Channels: 3
• Pwm Channels: 4
• 32khz Rtc: Yes
• Calibrated Rc Oscillator: Yes

39.6.9.15
6430E–ATARM–29-Aug-11
6430E–ATARM–29-Aug-11
STALL
STALL is returned by a function in response to an IN token or after the data phase of an OUT or
in response to a PING transaction. STALL indicates that a function is unable to transmit or
receive data, or that a control pipe request is not supported.
To stall an endpoint, set the FRCESTALL bit in UDPHS_EPTSETSTAx register and after the
STALL_SNT flag has been set, set the TOGGLE_SEG bit in the UDPHS_EPTCLRSTAx
register.
Set the FRCESTALL bit in UDPHS_EPTSETSTAx register.
Figure 39-16. Stall Handshake Data OUT Transfer
Figure 39-17. Stall Handshake Data IN Transfer
• OUT
• IN
USB Bus
Packets
FRCESTALL
STALL_SNT
USB Bus
Packets
FRCESTALL
STALL_SNT
Token OUT
Set by Firmware
Token IN
Set by Firmware
Data OUT
Set by Hardware
Set by Hardware
Stall PID
Stall PID
Interrupt Pending
Interrupt Pending
Cleared by Firmware
SAM3U Series
SAM3U Series
Cleared by Firmware
Cleared by Firmware
Cleared by Firmware
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