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Hi,
I am trying to program an AT89C51ED2 using FLIP and am always getting an timeout error. I have observed that the voltage on the reset pin always stays at about 4V. The connections are below: -> EA is connected to VCC -> PSEN is pulled down to ground with a 1K resistor using a push button switch. The connections for the reset pin as follows: VCC--10uF cap-- Reset Pin
The data sheet mentions that the reset pin has an internal pull down resistor to VSS therefore I did not add a pulldown resistor to the reset pin.
Even after adding a pulldown resistor of 10K to the reset pin the voltage at the reset pin always stays at logical high. What should I look into? PS: I have followed the appropriate steps as mentioned in the Datasheet to enter into the Bootloader ISP mode(Set PSEN to low and apply a RESET). Thanks in advance.