Honored Contributor
Honored ContributorThe quest is to replace the 'end-of-life' EP330s with new chips.It should simply involve desoldering the existing chips and replacing them with new ones(or equals) that have the same 'program' in them.
IF I had the pinout of the EP330 at least I'd KNOW which are inputs and outputs...it'd be a start. Since it's a 20 year old chip it can't be that complicated! I've thought about using a simple breadboard to toggle inputs and observe the outputs...once I have the pinout... I do know that pin 2..9 are tied low,pin 1 has a 12MHz clock to it, and 11,13..16 go 'somewhere'..at least there's scope 'action'. I do not have ANY information aside from what I've decoded in a quick rev-eng session to see what it's connected to.Can't 'read' it if security has been set so my 'breadboard' test should give me what I need to know...once I know the pinout.. I'm beginning to figure out I should NOT have tossed out an entire wall of databooks a couple of years ago. I know I had Atera books....sigh.. It's looking like I have to rev-eng the EP330 which should take less than a month or two if all goes well.I could speed that up by 1/2 if I had the pinout.Sure hate to lose the contract as originally I'd thought maybe 1 month to do the whole job.Great coins to time ratio.....
