rainman1
Newbie level 5
Hello guys.
In my PCB, I have a USB-to-UART bridge, CP2102, and a microcontroller, CC2430.
I've connected both RST pins of these devices together to a pull-up resistor.
I'm facing a serious problem.
Each time I power-up the system, the UC experiences an HW reset, not POR reset (meaning, the UC's RST pin is being lowered to 0V and araised back to VDD).
When I removed the USB-to-UART bridge from the PCB, this problem was solved.
Could you help me please and tell me why does the CP2102 cause a HW reset to the UC each time the system is powered-up?
Here is a quotation from the CP2102's datasheet:
"the reset pin, an I/O Device Reset pin, is an Open-drain output of internal POR or VDD monitor."
Thank you very much.
In my PCB, I have a USB-to-UART bridge, CP2102, and a microcontroller, CC2430.
I've connected both RST pins of these devices together to a pull-up resistor.
I'm facing a serious problem.
Each time I power-up the system, the UC experiences an HW reset, not POR reset (meaning, the UC's RST pin is being lowered to 0V and araised back to VDD).
When I removed the USB-to-UART bridge from the PCB, this problem was solved.
Could you help me please and tell me why does the CP2102 cause a HW reset to the UC each time the system is powered-up?
Here is a quotation from the CP2102's datasheet:
"the reset pin, an I/O Device Reset pin, is an Open-drain output of internal POR or VDD monitor."
Thank you very much.
