Hello,
I have a CC2430 MCU.
I defined one of its pins as a GPIO input pull-up pin.
I connected this pin to an external pin, INT.
INT is normally high, and should causes an interrupt when gets low.
The problem is that the MCU pin that were connected to INT pin, forced INT to stay high, and therefore when INT was trying to get low, he only reached 2.9V and not 0V, and therefore didnt cause interrupt.
How can i solve this problem?
Thanks.
Addition:
If i set the MCU pin as tri-state instead of pull-up, would the MCU pin's output will be normally high, because the INT pin's output is normally high?
(would it solve the problem?)
How come the MCU input pin doesnt allow INT to get low?
I have a CC2430 MCU.
I defined one of its pins as a GPIO input pull-up pin.
I connected this pin to an external pin, INT.
INT is normally high, and should causes an interrupt when gets low.
The problem is that the MCU pin that were connected to INT pin, forced INT to stay high, and therefore when INT was trying to get low, he only reached 2.9V and not 0V, and therefore didnt cause interrupt.
How can i solve this problem?
Thanks.
Addition:
If i set the MCU pin as tri-state instead of pull-up, would the MCU pin's output will be normally high, because the INT pin's output is normally high?
(would it solve the problem?)
How come the MCU input pin doesnt allow INT to get low?
Last edited: