nRF9160 Level translator requirement

[Shivam Saxena]

We are using nRF9160 as the host MCU and Modem for communicating to server. If VDD_GPIO is powered by 3V external supply and SIM card is powered by VDD_SIM i.e. 1.8V Do we need a level translator in between the SIM card and nRF9160 signals which are SIM_ClK, SIM_RESET, SIM_I/O

[Håkon Alseth]

Hi,

 

 

Do we need a level translator in between the SIM card and nRF9160 signals which are SIM_ClK, SIM_RESET, SIM_I/O

 No. The sim card is handled by the modem, and the VDD_SIM is 1.8V, regardless of what you run your GPIOs on.

 

Kind regards,

Håkon