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???
01/02/03 14:38
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#35412 - RE: P89C557E4
EA is connected to PSEN via a 3k3 resistor, this is how i got the hardware.
if internal code is used connect the pin to Vcc, if not, connect it to ground (use a cliplead, just to see). With a 3k3 resistor, you can leave the rest in. Are you sure the 3k3 goes to !PSEN ?

One more question:
how do you load your code into the chip ?

Erik


List of 15 messages in thread
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P89C557E4            01/01/70 00:00      
RE: P89C557E4            01/01/70 00:00      
RE: P89C557E4            01/01/70 00:00      
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RE: P89C557E4            01/01/70 00:00      
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RE: P89C557E4            01/01/70 00:00      
RE: P89C557E4            01/01/70 00:00      
RE: P89C557E4            01/01/70 00:00      
RE: P89C557E4            01/01/70 00:00      
RE: P89C557E4            01/01/70 00:00      
RE: P89C557E4            01/01/70 00:00      
RE: P89C557E4            01/01/70 00:00      
RE: P89C557E4            01/01/70 00:00      
RE: P89C557E4            01/01/70 00:00      

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