SAM3N2B Atmel Corporation, SAM3N2B Datasheet - Page 602
SAM3N2B
Manufacturer Part Number
SAM3N2B
Description
Manufacturer
Atmel Corporation
Specifications of SAM3N2B
Flash (kbytes)
128 Kbytes
Pin Count
64
Max. Operating Frequency
48 MHz
Cpu
Cortex-M3
# Of Touch Channels
23
Hardware Qtouch Acquisition
No
Max I/o Pins
47
Ext Interrupts
47
Quadrature Decoder Channels
2
Usb Speed
No
Usb Interface
No
Spi
3
Twi (i2c)
2
Uart
4
Ssc
1
Graphic Lcd
No
Video Decoder
No
Camera Interface
No
Adc Channels
10
Adc Resolution (bits)
10
Adc Speed (ksps)
384
Resistive Touch Screen
No
Dac Channels
1
Dac Resolution (bits)
10
Temp. Sensor
No
Crypto Engine
No
Sram (kbytes)
16
Self Program Memory
YES
Dram Memory
No
Nand Interface
No
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
no / no
Timers
6
Output Compare Channels
6
Input Capture Channels
3
Pwm Channels
4
32khz Rtc
Yes
Calibrated Rc Oscillator
Yes
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Figure 31-20. 2-bit Gray Up/Down Counter.
31.6.16
602
602
TIOAx
TIOBx
DOWNx
SAM3N
SAM3N
Write Protection System
TC_RCx
In order to bring security to the Timer Counter, a write protection system has been implemented.
The write protection mode prevent the write of TC_BMR, TC_CMRx, TC_SMMRx, TC_RAx,
TC_RBx, TC_RCx registers. When this mode is enabled and one of the protected registers
write, the register write request canceled.
Due to the nature of the write protection feature, enabling and disabling the write protection
mode requires the use of a security code. Thus when enabling or disabling the write protection
mode the WPKEY field of the TC_WPMR register must be filled with the “TIM” ASCII code (cor-
responding to 0x54494D) otherwise the register write will be canceled.
WAVEx = GCENx =1
11011A–ATARM–04-Oct-10
11011A–ATARM–04-Oct-10
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