Hi all,
I am new to this list.
I am using P89C51RD2BN, through ISP i am trying to program it. but it is not entering into ISP mode. I am using FlashMagic to do programming. it is giving me error as "Unable to connect at specified boud rate. Try reducing the boud rate"!
I have made circuitry as per AN461, the only difference is that in the reset circuit i am using 8.2K resister instead of 10K specified in AN461. also EA/VPP line is kept floating but in AN461 they have shown that that pin is connected to ground through 0.1uF capacitor. is the problem i am facing is due to these differences?. I have a jumper for PSEN pin to put microcontroller in to ISP.
please help me.
looking for your reply!
thanking in advance,
regards,
Kiran