SLAAE75A November 2022 – March 2023 MSPM0L1105 , MSPM0L1106 , MSPM0L1303 , MSPM0L1304 , MSPM0L1304-Q1 , MSPM0L1305 , MSPM0L1305-Q1 , MSPM0L1306 , MSPM0L1306-Q1 , MSPM0L1343 , MSPM0L1344 , MSPM0L1345 , MSPM0L1346
The MSPM0L series devices use a 3.3-V logic level (excluding ODIO). To communicate with 1.8-V devices without an external level shifter device, #GUID-5B093D09-9DC9-4408-9B12-7F6341B2D9EA shows a suggested circuit for interfacing with a 1.8-V device.
Two MOSFET are used in this circuit - check the VGS to ensure this MOSFET be able to fully turn on with a low RDS(on): for a 1.8-V device, use less than 1.8-V VGS MOSFET. However, do not use a too low VGS MOSFET, as this causes the MOSFET to turn on at a very small voltage (MCU logic judges it as 0), resulting in communication logic error.