>Those "JW" parts are UV-erasable, so long as you don't turn on the >"Code-Protect" bit when you program them. If you _do_ turn it on, expect about 2 hours of UV to be needed to use your chip again. Andy ================================================================== Andy Kunz - Montana Design - 409 S 6th St - Phillipsburg, NJ 08865 Hardware & Software for Industry & R/C Hobbies "Go fast, turn right, and keep the wet side down!" ==================================================================