Apparatus and method for testing driver writeability strength on an integrated circuit

A drive detection unit comprising:

• a plurality of drive modules, wherein at least some of the drive modules have a different drive strength, and wherein each drive module includes:
• a driver configured to drive an associated drive voltage onto a respective corresponding output line;
• a keeper configured to maintain a different voltage on the respective corresponding output line;
• a detection circuit coupled to the respective corresponding output line, and configured to output a first digital value in response to detecting the associated drive voltage is being driven on the respective corresponding output line.

A method comprising:

• executing a drive strength test using a drive detection unit including a plurality of drive modules within an integrated circuit, wherein executing the drive strength test comprises:
• a first transistor of each drive module retaining a given voltage level on a respective corresponding output line of each drive module, wherein the first transistor is associated with a first drive strength;
• a second transistor of each drive module driving an associated drive voltage onto the respective corresponding output line, wherein at least some of the second transistors have a different drive strength;
• outputting from each drive module a first digital value that corresponds to the associated drive voltage in response to a detection of the associated drive voltage being driven on the respective corresponding output line.