The MAGPIO interface consists of digital 1.8 V I/O pins 21–23 that can be controlled by the Long-Term Evolution (LTE) and DECT NR+ modem and nRF9151 application processor.
After VDD and ENABLE pins go high, MAGPIO resets to a pull-down state.
MAGPIO is mainly intended for nRF9151-external RF component control use cases. MAGPIO is active only when the nRF9151 LTE modem is active.
The maximum output current for MAPGIO is 0.5 mA.
To use MAGPIO, you must execute the AT%XMAGPIO command. If
AT%XMAGPIO is not set, MAGPIO stays in the reset state. For more information,
see MAGPIO configuration %XMAGPIO in nRF91x1 Cellular AT Commands Reference
Guide.
The following table shows the status of the MAGPIO pins for different states of nRF9151 and the LTE modem.
| nRF9151 state | LTE modem | MAGPIO pins |
|---|---|---|
| System ON | Enabled | Active |
| System ON | Disabled | Pulled down |
| System ON IDLE | Enabled | Retained |
| System ON IDLE | Disabled | Pulled down |
| System OFF | Disabled | Pulled down |
| System DISABLED1 with ENABLE low | Disabled | High impedance (ESD clamped) |
When controlled by the LTE modem, MAGPIO timing is aligned with the LTE and DECT NR+ protocols, which enables synchronous control for nRF9151-external components, such as the antenna tuner. For more information, see LTE RF control external interface in nRF9151 Product Specification.