SAM9G10 Atmel Corporation, SAM9G10 Datasheet - Page 151

• Manufacturer Part Number: SAM9G10
• Manufacturer: Atmel Corporation

Specifications of SAM9G10

• Flash (kbytes): 0 Kbytes
• Pin Count: 217
• Max. Operating Frequency: 266 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: 4
• Ssc: 3
• Sd / Emmc: 1
• Graphic Lcd: Yes
• Video Decoder: No
• Camera Interface: No
• Resistive Touch Screen: No
• Temp. Sensor: No
• Crypto Engine: No
• Sram (kbytes): 16
• 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): 1.08 to 1.32
• Fpu: No
• Mpu / Mmu: No/Yes
• Timers: 3
• Output Compare Channels: 3
• Input Capture Channels: 3
• 32khz Rtc: Yes
• Calibrated Rc Oscillator: No

17. Watchdog Timer (WDT)
17.1
17.2
17.3
Figure 17-1. Watchdog Timer Block Diagram
11053B–ATARM–22-Sep-11
11053B–ATARM–22-Sep-11
Description
Embedded Features
Block Diagram
WDRSTT
WDT_CR
read WDT_SR
or
reset
write WDT_MR
The Watchdog Timer can be used to prevent system lock-up if the software becomes trapped in
a deadlock. It features a 12-bit down counter that allows a watchdog period of up to 16 seconds
(slow clock at 32.768 kHz). It can generate a general reset or a processor reset only. In addition,
it can be stopped while the processor is in debug mode or idle mode.
• 16-bit Key-protected only-once Programmable Counter
• Provides Reset or Interrupt Signals to the System
• Windowed, prevents the processor to be in a dead lock on the watchdog access
• Counter May Be Stopped While the Processor is in Debug State or in Idle Mode
• AMBA
WDT_MR
– Interfaces to the ARM
WDD
WDERR
™
<= WDD
-compliant Interface
set
reset
reload
WDT_MR
WDV
12-bit Down
1
WDUNF
Counter
Current
Value
= 0
®
reset
set
Advanced Peripheral Bus
0
1/128
reload
WDRSTEN
WDT_MR
WDT_MR
WDFIEN
SLCK
(to Reset Controller)
wdt_int
wdt_fault
SAM9G35
SAM9G35
151
151