In article <347358DC.7B0539D5@sunada.com>, Matt Bonner writes >MChip's official position is that code-protected devices cannot be >erased. I have done some playing around and have found that they _can_ >be erased. These are my observations: > 1. Some 74As can take many hours to erase (3 or 4). > 2. Code-protected parts tend to erase faster if they've been programmed Thanks - I'll give them a good soaking! What's really hacked me off about this is Microchips failure to put this in the data sheet (although someone said it was on the CDROM - which I havent got). Their latest 16CXX data sheet doesn't mention it at all - which I think borders on the criminal. It should be up there in bright shiny red 36 point letters...! ..still I guess it makes them a few more sales.. I'll let you know if I recover them.. Jim -- Jim Main