Hardware reset for nrf9160

[Rkidechaa]

Hi,

we are developing one prototype where we are using two MCU for different task. we are planning to give common reset button (for customer access) for both the MCU using PMIC. But in nrf9160 i can see only nRESET pin which connected to SWD connector.

Question:

1) As I we are using the common reset connection while flashing the code to nrf9160 through SWD will reset other microcontroller too ?

2) can you suggested other hardware implementation for nrf9160?

3) if I use two different diode in path of reset to both the controller will solve issue?

if you see above circuit, they used MOSFET circuit between RESET and nRESET. can we connect RESET to nRESET directly?

is it necessary to connect RESET to nRESET ? can we burn program via SWD with using SWD pin?

Thank you in advance.

Regards,

Rahul Kidecha

[ketiljo]

The reset pin is an input only., active low. It will not be pulled low from the nRF9160 side  if you do a system reset command. 

You don't need to connect the programmer to the reset line, only SWDIO and SWCLK are needed.

It's fairly unusual to have a active high reset pin, so check the other MCU again. It's possible that you can just connect them together.