Solved
stm8af5288 nrst pin 1K resistance?
Will the external 1k resistor of the nrst pin have an effect?
This topic has been closed for replies.
In the worst case, the internal pull-up resistor may have a minimum value of about 30K , so when you generate a Reset, the effective voltage level of NRST input, will be (VCC/31K)*1K = 0,106V
This value is much lower than the maximum level of 0.8V, required to reset the STM8Lxx.
Therefore all voltages below this value will generate a microcontroller reset.
Instead, I don't know how your MCU reset is generated, but if you really want to insert a 1K resistor in series at the NRST input, it would be better if it was placed before the 100nF by-pass capacity.
In this way you would also have a certain filter effect.
Enter your E-mail address. We'll send you an e-mail with instructions to reset your password.