SAM3U4E Atmel Corporation, SAM3U4E Datasheet - Page 287
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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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19.4.4
6430E–ATARM–29-Aug-11
6430E–ATARM–29-Aug-11
Using Backup Batteries/Backup Supply
The product can be used with or without backup batteries, or more generally a backup supply.
When a backup supply is used (See
mode and no other external supply is applied on the chip. In this case the user needs to clear
VDDIORDY bit in the Supply Controller Mode Register (SUPC_MR) at least two slow clock peri-
ods before VDDIO voltage is removed. When waking up from Backup mode, the programmer
needs to set VDDIORDY.
Figure 19-2. Separated Backup Supply Powering Scheme
Note:
When a separated backup supply for VDDBU is not used (See
voltage applied on VDDIO is kept, all of the I/O configurations (i.e. WKUP pin configuration) are
kept during backup mode. When not using backup batteries, VDDIORDY is set so the user does
not need to program it.
Restrictions: With Main Supply < 3V, some peripherals such as USB and ADC might not be oper-
ational. Refer to the DC Characteristics of the product for actual possible ranges for such
peripherals.
Main Supply (1.8V-3.6V)
Figure
Backup Batteries
19-2), only VDDBU voltage is present in Backup
VDDUTMI
VDDANA
VDDCORE
VDDBU
VDDIO
FWUP
VDDIN
VDDPLL
VDDOUT
SHDN
Figure
SAM3U Series
SAM3U Series
19-3), since the external
Regulator
Voltage
287
287
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