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pullup/pulldown on TMS320DM648

Hello,

Per datasheet (and I'll pick a specific GPIO), GP15 has an internal pulldown. Can the pulldown be disabled? Does not seem like it, but I might as well ask. 

Also, what is the value of the pulldown? Seems to be 10k, but I need a confirmation. Also, how big is the process tolerance? +/-5%, or +/-20%. I am trying to determine the optimal value for the external pullups. 

Thanks. 

Alin