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Hot!Can't get to bootloader AT89C5115

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2020/08/28 11:04:36 (permalink)

Can't get to bootloader AT89C5115

I have included the schematic for my board.  I have corrected a couple of noted mistakes with cuts/jumpers.  I can see the "U" character from the Flip software getting to the RX pin of the uP.  Nothing happening on the Tx pin.  I have tried a 22uF cap in the reset circuit. I can see the crystal running on the osc pins of the uP.  I can see V+ and Gnd on the Vpp and Vss pins.  It should be going to the bootloader.  Flip tells me timeout everytime.  What else should I try?
Thanks for your help.

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