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Set T3LD Watchdog Register without T3CON

The ADUC7021x62 microcontroller is used in the project. and there was a crash problem. And it is solved when the line below is commented out.

The Code Line T3LD = 640;

Now it is written on the datasheet ` Bit 5 in the T3CON MMR must be set after writing to T3LD MMR. `

What would happen if the T3CON MMR register is not set even we write T3LD register? Does this explain why the device crashed is?

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