gang programming for 8051

[sadashiv_sm]

Hi...
anybody have a document or a circuit for how to program multiple 8051 uc's
i searched on the net ...and still searching....


Thanks

Sadashiv
www.custom-logics.com

 

[IanP]

Standard 8051 is a ROM-less device, so what would you like to program there?
However, if you consider ROM/EPROM version of the 8051, namely 8751 (in various versions with OTP, EPROM ...), you can use single programmer's circuit and connect several units in parallel. The only difference will be that you will have make sure that each of the programmed devices has sufficient power supply and that each address/data lines can drive numbers of MCUs.
Regards,
IanP