Modern SPMI specs (v2.0+) include for advanced features:

Engineers often ask: "Why not just use I2C or SPI?" The answers this explicitly in its introduction.

The official, authoritative MIPI SPMI specification document is managed and distributed by the . It is not freely available for download due to its copyright and licensing model.

The MIPI SPMI (System Power Management Interface) is a specification developed by the Mobile Industry Processor Interface (MIPI) Alliance, a collaborative effort of leading companies in the mobile industry. The SPMI specification defines a standardized interface for power management in system-on-chip (SoC) designs, enabling efficient and flexible power management.