SAM3U2C Atmel Corporation, SAM3U2C Datasheet - Page 1068

• 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

41.5.6
41.5.7
Figure 41-3. EOCx and DRDY Flag Behavior
1068
(ADC_CHSR)
(ADC_SR)
(ADC_SR)
EOCx
DRDY
CHx
SAM3U Series
Power Consumption Adjustment
Conversion Results
Write the ADC_CR
with START = 1
The power consumption of the ADC12B can be adjusted through a 2-bit bias control (IBCTL bit
in ADC12B_ACR register) providing possibilities for smart optimization of power and effective
resolution relative to the application speed request.
Please refer to the Electrical Characteristics of the product datasheet for further details.
When a conversion is completed, the resulting 12-bit digital value is stored in the Channel Data
Register (ADC12B_CDR) of the current channel and in the ADC12B Last Converted Data Regis-
ter (ADC12B_LCDR).
The channel EOC bit in the Status Register (ADC12B_SR) is set and the DRDY bit is set. In the
case of a connected PDC channel, DRDY rising triggers a data transfer request. In any case,
either EOC and DRDY can trigger an interrupt.
Reading one of the ADC12B_CDR registers clears the corresponding EOC bit. Reading
ADC12B_LCDR clears the DRDY bit and the EOC bit corresponding to the last converted
channel.
Conversion Time
Read the ADC_CDRx
Write the ADC_CR
with START = 1
Conversion Time
Read the ADC_LCDR
6430E–ATARM–29-Aug-11