Post by thread:Programming current

Hi all. I want to build a programmer which runs of a 6V or 9V supply and so Im going to use a DC/DC convertor to provide the programming voltage. Does anyone know what current is drawn at 14V by the PIC in programming mode (on average) Thanks for the help.

---------- > : Jon Baker <spam_OUTjonTakeThisOuTMARZIPAN.DEMON.CO.UK> > Hi all. > > I want to build a programmer which runs of a 6V or 9V supply and so Im going > to use a DC/DC convertor to provide the programming voltage. > > Does anyone know what current is drawn at 14V by the PIC in programming mode > (on average) You can read the datasheet! According to DS programmer VPP current may be up to 50mA, but in the reality - 5-100mA (in ave.) its enough. Alex Torres, Kharkov, Ukraine (exUSSR) .....altorKILLspam@spam@chat.ru 2:461/28@FidoNet www.geocities.com/SiliconValley/Lab/6311

Jon Baker <PICLISTKILLspamMITVMA.MIT.EDU> wrote: > Does anyone know what current is drawn at 14V by the PIC in > programming mode (on average) Jon: If you're building a 16C84/F84 programmer, essentially zero current is drawn from the Vpp supply; the high voltage is just a switch that puts the PIC into programming mode. The EPROM-based PICs, on the other hand, DO draw some current from the Vpp line... The programming specs say that the curent should be limited to 50 mA, but I think the chips really only draw 10-25 mA. -Andy === Andrew Warren - .....fastfwdKILLspam.....ix.netcom.com === Fast Forward Engineering - Vista, California === http://www.geocities.com/SiliconValley/2499