SAM3N2A Atmel Corporation, SAM3N2A Datasheet - Page 374

• Manufacturer Part Number: SAM3N2A
• Manufacturer: Atmel Corporation

Specifications of SAM3N2A

• Flash (kbytes): 128 Kbytes
• Pin Count: 48
• 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: 2
• Twi (i2c): 2
• Uart: 3
• Ssc: 1
• Graphic Lcd: No
• Video Decoder: No
• Camera Interface: No
• Adc Channels: 8
• Adc Resolution (bits): 10
• Adc Speed (ksps): 384
• Resistive Touch Screen: No
• 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

24.15.19 PMC Write Protect Mode Register
Name:
Address:
Access:
Reset:
• WPEN: Write Protect Enable
0 = Disables the Write Protect if WPKEY corresponds to 0x504D43 (“PMC” in ASCII).
1 = Enables the Write Protect if WPKEY corresponds to 0x504D43 (“PMC” in ASCII).
Protects the registers:
• WPKEY: Write Protect KEY
Should be written at value 0x504D43 (“PMC” in ASCII). Writing any other value in this field aborts the write operation of the
WPEN bit. Always reads as 0.
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“PMC System Clock Enable Register” on page 355
“PMC System Clock Disable Register” on page 355
“PMC Peripheral Clock Enable Register” on page 357
“PMC Peripheral Clock Disable Register” on page 358
“PMC Clock Generator Main Oscillator Register” on page 360
“PMC Clock Generator PLL Register” on page 363
“PMC Master Clock Register” on page 364
“PMC Programmable Clock Register” on page 365
“PMC Fast Startup Mode Register” on page 371
“PMC Fast Startup Polarity Register” on page 372
“PMC Oscillator Calibration Register” on page 376
31
23
15
7
–
SAM3N
PMC_WPMR
0x400E04E4
Read-write
See
Table 24-2
30
22
14
6
–
29
21
13
5
–
28
20
12
4
–
WPKEY
WPKEY
WPKEY
27
19
11
3
–
26
18
10
2
–
25
17
9
1
–
11011A–ATARM–04-Oct-10
WPEN
24
16
8
0