difference stepper driver A4983 and A4988

[makerman]

The German reprapfoundaion has two different stepper drivers.
http://reprapsource.com/en/shop/list/196
What are the differences between those two?

[Karl Gustav Rutz]

from http://www.pololu.com/catalog/product/1182
 

This board is a drop-in replacement for the A4983 stepper motor driver carrier. The A4988 offers overcurrent protection and has an internal 100k pull-down on the MS1 microstep selection pin, but it is otherwise virtually identical to the A4983 and should work in systems designed specifically for the A4983.

 

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