Microchip gives this information for free. Although Im not an expert on the subject of 'pic programming algorythm' , a= fast search lead me to these datasheets http://ww1.microchip.com/downloads/en/appnotes/00656b.pdf http://ww1.microchip.com/downloads/en/appnotes/00910a.pdf I hope this helps Gisli escribi=F3: = Thank you Mauricio, = do you know if the programming codes are available online and if so where? -- View this message in context: http://www.nabble.com/Using-PIC-to-write-to-t= he-EEPROM-of-another-PIC-t1272979.html#a3380968 Sent from the MicroControllers - PIC forum at Nabble.com. -- = http://www.piclist.com PIC/SX FAQ & list archive View/change your membership options at http://mailman.mit.edu/mailman/listinfo/piclist = --------------------------------- 1GB gratis, Antivirus y Antispam Correo Yahoo!, el mejor correo web del mundo Abr=ED tu cuenta aqu=ED -- = http://www.piclist.com PIC/SX FAQ & list archive View/change your membership options at http://mailman.mit.edu/mailman/listinfo/piclist