I am trying to use the ISP bootloader on the Philips P89C51RC2Hxx. I am looking for any information on what I have to do to my code to get it to work. For my hardware, I have EA tide high and a jumper on PSEN that allows me to pull it low. I intend to use the default bootloader located at 0xFC00. I have the FlashMagic utility for communicating with my board. Steve
http://www.semiconductors.philips.com/acrobat/applicationnotes/AN461_9.pdf gives you all the info you need e.g. p2.6 and p2.7 which you miss Erik
Steve, You may also want to check here: http://www-eu2.semiconductors.com/acrobat/other/mcu/rx2_02_errata.pdf Alan...
all that basically says is that if you use RC reset you are in trouble, use a watchdog. Happy new year Erik
sorry, SUPERVISOR Erik