SAM3U4E Atmel Corporation, SAM3U4E Datasheet - Page 521
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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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30.6.1
6430E–ATARM–29-Aug-11
6430E–ATARM–29-Aug-11
Write Protection Registers
To prevent any single software error that may corrupt PIO behavior, certain address spaces can
be write-protected by setting the WPEN bit in the
(PIO_WPMR).
If a write access to the protected registers is detected, then the WPVS flag in the PIO Write Pro-
tect Status Register (PIO_WPSR) is set and the field WPVSRC indicates in which register the
write access has been attempted.
The WPVS flag is reset by writing the PIO Write Protect Mode Register (PIO_WPMR) with the
appropriate access key, WPKEY.
The protected registers are:
•
•
•
•
•
•
•
•
•
•
•
•
•
“PIO Controller PIO Enable Register” on page 524
“PIO Controller PIO Disable Register” on page 524
“PIO Controller Output Enable Register” on page 525
“PIO Controller Output Disable Register” on page 526
“PIO Controller Input Filter Enable Register” on page 527
“PIO Controller Input Filter Disable Register” on page 527
“PIO Multi-driver Enable Register” on page 532
“PIO Multi-driver Disable Register” on page 533
“PIO Pull Up Disable Register” on page 534
“PIO Pull Up Enable Register” on page 534
“PIO Peripheral AB Select Register” on page 535
“PIO Output Write Enable Register” on page 538
“PIO Output Write Disable Register” on page 538
“PIO Write Protect Mode Register”
SAM3U Series
SAM3U Series
521
521
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