AT91M63200-25AI Atmel, AT91M63200-25AI Datasheet - Page 138

• Manufacturer Part Number: AT91M63200-25AI
• Description: IC ARM7 MCU 176 TQFP
• Manufacturer: Atmel
• Series: AT91SAMr

Specifications of AT91M63200-25AI

• Core Processor: ARM7
• Core Size: 16/32-Bit
• Speed: 25MHz
• Connectivity: EBI/EMI, SPI, UART/USART
• Peripherals: POR, WDT
• Number Of I /o: 58
• Program Memory Type: OTP
• Ram Size: 2K x 8
• Voltage - Supply (vcc/vdd): 1.8 V ~ 3.6 V
• Oscillator Type: External
• Operating Temperature: -40°C ~ 85°C
• Package / Case: 176-TQFP, 176-VQFP
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant
• Eeprom Size: -
• Program Memory Size: -
• Data Converters: -

WD Enabling Sequence
To enable the Watchdog timer the sequence is as follows:
1. Disable the Watchdog by clearing the bit WDEN:
2. Initialize the WD Clock Mode Register:
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Write 0x2340 to WD_OMR.
This step is unnecessary if the WD is already disabled
(reset state).
Write 0x373C to WD_CMR
(HPCV = 15 and WDCLKS = MCK/8).
AT91M63200
3. Restart the timer:
4. Enable the Watchdog:
Write 0xC071 to WD_CR.
Write 0x2345 to WD_OMR (interrupt enabled).