Well, I happenm to have 2 shelves of Philips IC databooks... But I don't need to look at them to tell you that's an 8031 microcontroller. That's the ROMless 8051 (so there's no internal program ROM to worry about, it'll have a '373 or '573 address latch and an EPROM alongside it). Pinout is the same as the 8051, excepet that you always tie EA high to disable the non-existant internal ROM (actually, in a lot of cases the intenral ROM exists, but it corrupted/non-fuctioning. It was once said that most 8032's actually had corrupted versions of 8052 BAISC in the ROM, and were 8052-BASIC chips that had failed the ROM test, but which worked in all other respsects) -tony