Nick_F wrote: > I can accept a resolution of 2us (or even up to 5us). > I just thought 1us should be easily achievable, The spec should describe what you need, which has nothing to do with what you think a particular implementation can provide. Instead of letting the tail wag the dog, decide what you need this gizmo to do, then look around for a solution once the requirements are clear. Again, it would also help to explain what the purpose of the gizmo is. ******************************************************************** Embed Inc, Littleton Massachusetts, http://www.embedinc.com/products (978) 742-9014. Gold level PIC consultants since 2000. -- http://www.piclist.com PIC/SX FAQ & list archive View/change your membership options at http://mailman.mit.edu/mailman/listinfo/piclist