SAM9G20 Atmel Corporation, SAM9G20 Datasheet - Page 116

• Manufacturer Part Number: SAM9G20
• Manufacturer: Atmel Corporation

Specifications of SAM9G20

• Flash (kbytes): 0 Kbytes
• Pin Count: 217
• Max. Operating Frequency: 400 MHz
• Cpu: ARM926
• Hardware Qtouch Acquisition: No
• Max I/o Pins: 96
• Ext Interrupts: 96
• Usb Transceiver: 3
• Usb Speed: Full Speed
• Usb Interface: Host, Device
• Spi: 2
• Twi (i2c): 1
• Uart: 7
• Ssc: 1
• Ethernet: 1
• Sd / Emmc: 1
• Graphic Lcd: No
• Video Decoder: No
• Camera Interface: Yes
• Adc Channels: 4
• Adc Resolution (bits): 10
• Adc Speed (ksps): 95
• Resistive Touch Screen: No
• Temp. Sensor: No
• Crypto Engine: No
• Sram (kbytes): 32
• Self Program Memory: NO
• External Bus Interface: 1
• Dram Memory: sdram
• 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
• 32khz Rtc: Yes
• Calibrated Rc Oscillator: No

17.4
Table 17-1.
17.4.1
Register Name:WDT_CR
Access Type: Write-only
• WDRSTT: Watchdog Restart
0: No effect.
1: Restarts the Watchdog.
• KEY: Password
Should be written at value 0xA5. Writing any other value in this field aborts the write operation.
116
Offset
0x00
0x04
0x08
31
23
15
–
–
7
–
Watchdog Timer (WDT) User Interface
AT91SAM9G20
Watchdog Timer Control Register
Register Mapping
Register
Control Register
Mode Register
Status Register
30
22
14
–
–
6
–
29
21
13
–
–
5
–
28
20
12
–
–
4
–
KEY
Name
WDT_CR
WDT_MR
WDT_SR
27
19
11
–
–
3
–
26
18
10
–
–
2
–
Read-write Once
Read-only
Write-only
Access
25
17
–
9
–
1
–
6384E–ATARM–05-Feb-10
0x3FFF_2FFF
0x0000_0000
Reset
WDRSTT
-
24
16
–
8
–
0