SAM9X25 Atmel Corporation, SAM9X25 Datasheet - Page 229

• Manufacturer Part Number: SAM9X25
• Manufacturer: Atmel Corporation

Specifications of SAM9X25

• Flash (kbytes): 0 Kbytes
• Pin Count: 217
• Max. Operating Frequency: 400 MHz
• Cpu: ARM926
• Hardware Qtouch Acquisition: No
• Max I/o Pins: 105
• Ext Interrupts: 105
• Usb Transceiver: 3
• Usb Speed: Hi-Speed
• Usb Interface: Host, Device
• Spi: 2
• Twi (i2c): 3
• Uart: 7
• Can: 2
• Lin: 4
• Ssc: 1
• Ethernet: 2
• Sd / Emmc: 2
• Graphic Lcd: No
• Video Decoder: No
• Camera Interface: No
• Adc Channels: 12
• Adc Resolution (bits): 10
• Adc Speed (ksps): 440
• Resistive Touch Screen: No
• Temp. Sensor: No
• Crypto Engine: No
• Sram (kbytes): 32
• Self Program Memory: NO
• External Bus Interface: 1
• Dram Memory: DDR/LPDDR, SDRAM/LPSDR
• Nand Interface: Yes
• Picopower: No
• Temp. Range (deg C): -40 to 85
• I/o Supply Class: 1.8/3.3
• Operating Voltage (vcc): 0.9 to 1.1
• Fpu: No
• Mpu / Mmu: No/Yes
• Timers: 6
• Output Compare Channels: 6
• Input Capture Channels: 6
• Pwm Channels: 4
• 32khz Rtc: Yes
• Calibrated Rc Oscillator: No

23.5.15
11054A–ATARM–27-Jul-11
11054A–ATARM–27-Jul-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:
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“PIO Enable Register” on page 234
“PIO Disable Register” on page 234
“PIO Output Enable Register” on page 235
“PIO Output Disable Register” on page 236
“PIO Input Filter Enable Register” on page 237
“PIO Input Filter Disable Register” on page 237
“PIO Multi-driver Enable Register” on page 242
“PIO Multi-driver Disable Register” on page 243
“PIO Pull Up Disable Register” on page 244
“PIO Pull Up Enable Register” on page 244
“PIO Peripheral ABCD Select Register 1” on page 246
“PIO Peripheral ABCD Select Register 2” on page 247
“PIO Output Write Enable Register” on page 252
“PIO Output Write Disable Register” on page 252
“PIO Pad Pull Down Disable Register” on page 250
“PIO Pad Pull Down Status Register” on page 251
“PIO Write Protect Mode Register”
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SAM9X25
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