TK. Posted August 24, 2003 Report Share Posted August 24, 2003 to people who were not able to burn a PIC18F452 yet:Best Regards, Thorsten. Quote Link to comment Share on other sites More sharing options...
TK. Posted August 25, 2003 Author Report Share Posted August 25, 2003 FYI: In the meantime two users who were not able to program a PIC18F452 before reported that this fix was the solution. They didn't need an external power supply.So please don't forget to add the resistor if you want to burn a PIC18FBest Regards, Thorsten. Quote Link to comment Share on other sites More sharing options...
d2k Posted August 26, 2003 Report Share Posted August 26, 2003 Hey...I've been burnin 16f/18f's fine without any of these changes, this resistor fix for the 18f is not essntial is it? I mean, if an 18f is burnt fine on a jdm without these fixes and seems okay - it's fine then right?BestDan Quote Link to comment Share on other sites More sharing options...
TK. Posted August 26, 2003 Author Report Share Posted August 26, 2003 I also burned a lot of PIC18F452 without this pull-down, but it seems that newer batches from the Microchip fab require it (there is nothing worst in logic design than floating input pins - maybe Microchip adjusted the process parameters and as a result the probability that this pin tends to logic-0 isn't so high anymore).However, you don't have to burn the firmware again, this pin is only important to select the correct programming mode on a "virgin" or erased flash. Once the configuration data has been uploaded, the LVP flag is disabled and you don't have to take care about it anymore.Best Regards, Thorsten. Quote Link to comment Share on other sites More sharing options...
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