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Reset pin on MC9S12XEQ pulls down for unknown reason

Question asked by programmer on Apr 14, 2013
Latest reply on Apr 15, 2013 by kef

Hello,

 

I've started writing code for the MC9S12XEQ.

The code resets the COP watchdog timer by writing 0x55 and 0xAA, but for unknown reason, the RESET pin pulls down for 1.5 ms every 50 milliseconds.

 

This is also happens whenever the debugger stops the MCU (which is logical, but it also happens when the debugger is not connected).

 

How can I keep the RESET pin always up?

 

Thank you.

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