an Eprom programmer will not work but a device programmer might.

These parts can be programmed from a universal device programmer - you will
need see if the device programmer covers the P89C51RD2HBA.

The P89C51RD2HBA may have the security bits locked - so you may not have
access read the data out and programm another.


"G.I.O." <tfg1@xxxxxxxxxxxxxx> wrote in message
> Phillips says no. The secondary markings do not matter. The part must be
> programmed and this is why they will not function.
> Can someone tell me if these parts can be copied from one to the other
> like
> using an Eprom programmer?