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Old 28th Nov 2022, 11:07 pm   #14
Mark1960
Octode
 
Join Date: Mar 2020
Location: Kitchener, Ontario, Canada
Posts: 1,297
Default Re: Tesla Programmer

When Vcc is raised to 10.5 volts does the output voltage of unprogrammed data pins also increase to 10.5v? This might be clamped to 5v by the esd protection diodes internal to the 8255, so just wondered if current limit resistors should be added on the 8255 inputs.
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