I'm working with the Philips 89C664HBA which is a 6-clock variant of the 8051. I understand (from the datasheet) that you can make this a
12-clock part via an OTP bit accessible by a parallel programmer. I'd like to try the part in 12-clock mode to see if it will solve a timing issue in an existing design. I'm not having much luck in determining exactly how to do that. What bit?
From the datasheet: "This device executes one instruction in 6 clock cycles, hence providing twice the speed of a conventional 80C51. An OTP configuration bit lets the user select conventional 12-clock timing if decided."
Should my crusty old Logical Devices Chipmaster 3000 be able to do this? Or will I need to purchase a programmer just to try it? What advertised capability would I need to look for when shopping for programmers?