Hello,

I programm my T89c51 with the FLIP ISP Software. But i can't start programm without the FLIP Software. Everytime when i make a reset (or switch the power on) the internal bootloader starts. The only way to start my programm is with the "Start Application" Button in the FLIP Software. I have read in the datasheet that the bootloader only should start, when the PSEN pin is on low level and the EA pin on high level during a reset. I want to use the PSEN pin to decide to start by bootloader or user programm (with a jumper).

What is wrong ?

Alex