SAM9G25 Atmel Corporation, SAM9G25 Datasheet - Page 269

• Manufacturer Part Number: SAM9G25
• Manufacturer: Atmel Corporation

Specifications of SAM9G25

• Flash (kbytes): 0 Kbytes
• Pin Count: 247
• 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
• Lin: 4
• Ssc: 1
• Ethernet: 1
• Sd / Emmc: 2
• Graphic Lcd: No
• Video Decoder: No
• Camera Interface: Yes
• 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: DDR2/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

23.7.46
Name:
Address:
Access:
Reset:
For more information on Write Protection Registers, refer to
Interface”.
• WPEN: Write Protect Enable
0: Disables the Write Protect if WPKEY corresponds to 0x50494F (“PIO” in ASCII).
1: Enables the Write Protect if WPKEY corresponds to 0x50494F (“PIO” in ASCII).
Protects the registers:
“PIO Enable Register” on page 244
“PIO Disable Register” on page 244
“PIO Output Enable Register” on page 245
“PIO Output Disable Register” on page 246
“PIO Input Filter Enable Register” on page 247
“PIO Input Filter Disable Register” on page 247
“PIO Multi-driver Enable Register” on page 252
“PIO Multi-driver Disable Register” on page 253
“PIO Pull Up Disable Register” on page 254
“PIO Pull Up Enable Register” on page 254
“PIO Peripheral ABCD Select Register 1” on page 256
“PIO Peripheral ABCD Select Register 2” on page 257
“PIO Output Write Enable Register” on page 262
“PIO Output Write Disable Register” on page 262
“PIO Pad Pull Down Disable Register” on page 260
“PIO Pad Pull Down Status Register” on page 261
11032A–ATARM–27-Jul-11
11032A–ATARM–27-Jul-11
31
23
15
7
–
PIO Write Protect Mode Register
PIO_WPMR
0xFFFFF4E4 (PIOA), 0xFFFFF6E4 (PIOB), 0xFFFFF8E4 (PIOC), 0xFFFFFAE4 (PIOD)
Read-write
See
Table 23-2
30
22
14
6
–
29
21
13
5
–
28
20
12
4
–
WPKEY
WPKEY
WPKEY
Section 23.7 ”Parallel Input/Output Controller (PIO) User
27
19
11
3
–
26
18
10
–
2
25
17
–
9
1
SAM9G25
SAM9G25
WPEN
24
16
8
0
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