SAM3U4E Atmel Corporation, SAM3U4E Datasheet - Page 1161
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SAM3U4E
Manufacturer Part Number
SAM3U4E
Description
Manufacturer
Atmel Corporation
Specifications of SAM3U4E
Flash (kbytes)
256 Kbytes
Pin Count
144
Max. Operating Frequency
96 MHz
Cpu
Cortex-M3
# Of Touch Channels
57
Hardware Qtouch Acquisition
No
Max I/o Pins
96
Ext Interrupts
96
Usb Transceiver
1
Quadrature Decoder Channels
1
Usb Speed
Hi-Speed
Usb Interface
Device
Spi
5
Twi (i2c)
2
Uart
5
Ssc
1
Sd / Emmc
1
Graphic Lcd
No
Video Decoder
No
Camera Interface
No
Adc Channels
16
Adc Resolution (bits)
12
Adc Speed (ksps)
384
Resistive Touch Screen
No
Temp. Sensor
No
Crypto Engine
No
Sram (kbytes)
50
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
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46.2.2
46.2.2.1
46.2.2.2
46.2.3
46.2.3.1
6430E–ATARM–29-Aug-11
12-bit Analog-to-Digital Converter (ADC12B)
Power Management Controller (PMC)
ADC12B: Current Consumption in Backup Mode on VDDANA
ADC12B: Saturation
PMC: Main Oscillator Frequency selection if the Main On-chip RC Oscillator is OFF
In Backup mode, the current consumption on VDDANA is around 1.0 mA instead of 0.1 μA
Four workarounds are possible:
When the ADC12B works in saturation (measurements below 0V or above ADREF) the results
may be erratic, the value deviation can be around 30 LSB to the expected data.
None.
When the 4/8/12 MHz RC Oscillator is off, the frequency selection (MOSCRCF bitfield in
CKGR_MOR) can not be changed. The register can be written but the modification to
MOSCRCF will not be taken into account.
Modify MOSCRCF while 4/8/12 MHz RC Oscillator is on (MOSCREN = 1).
1. Do not supply VDDANA and VDDIO in Backup mode using an external switch managed
2. Do not supply VDDANA in Backup mode using an external switch managed by the
3. Do not supply VDDANA in Backup mode using an external switch managed by any PIO
4. Use wait mode instead of Backup mode.
Problem Fix/Workaround
Problem Fix/Workaround
Problem Fix/Workaround
by SHDN pin.
SHDN and set all PIOs with ADC inputs (PA22, PA30, PB3-PB8, PC15-PC18, PC28-
C21) at low level (either externally or by software).
and set all PIOs with ADC inputs (PA22, PA30, PB3-PB8, PC15-PC18, PC28-C21) at
low level (either externally or by software). Since the PIO state is preserved when in
backup mode, any free PIO line can be used to switch off the external switch by driving
the PIO line at low level (PIO is input, pull-up enabled after backup reset).
SAM3U Series
1161
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