The MAGPIO interface consists of digital 1.8 V I/O pins 53–55 that can be controlled by the LTE modem and nRF9160 application processor.

When controlled by the LTE modem, MAGPIO timing is aligned with the LTE protocol, which enables LTE protocol synchronous control for nRF9160-external components, such as the antenna tuner. For more information, see LTE modem RF control external interface in nRF9160 Product Specification.