Hello, I would like to know in the SX28 and 52 how much cycle uses the djnz instruction. I looked on the SX Instruction set table : http://www.sxlist.com/techref/ubicom/inst.htm and it marked this : Instruction cycles DJNZ fr,addr 2 * but I does not understand what "2*" means. I think that in reality DJNZ uses 5 cycles on a jump and if not 4. could somebody give me the values exact ? I cannot make real test, all that I does is theoretical. and I would need some to write small a procedure of temporization. thinks, Best regards, Sebastien -- http://www.piclist.com hint: PICList Posts must start with ONE topic: [PIC]:,[SX]:,[AVR]: ->uP ONLY! [EE]:,[OT]: ->Other [BUY]:,[AD]: ->Ads