Many a times, I have used an I/O pin to drive a relay through a transistor. So, assuming I need an active high output to turn on the relay, I have observed (across microcontroller families) that the...
As others have said, after power on and reset (POR) all the pins come up as inputs so they should not go either high or low for any duration. Leakage current into...
its not quite that simple, contemporary chips like 18f27q43 have a pwm module that can use alternative clock sources like the mfosc @[500k] and its that allows 50hz operation, some others have...
if you have leds that illuminate on power up before the pins have been set as outputs then you are doing something very odd
or you have broken something
You should design your project with active low outputs to account for the High-Z input state at power on. Almost every microcontroller, I know, behaves...
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Re: I/O Pin status during startup
Many a times, I have used an I/O pin to drive a relay through a transistor. So, assuming I need an active high output to turn on the relay, I have observed (across microcontroller families) that the...
Jerson Today, 04:22