Because MIPI standards govern proprietary and highly controlled intellectual property, accessing the official, unredacted specification document involves specific protocol:
Each slave device on the bus is assigned a unique 4-bit . Within each slave, the specification supports a 16-bit address space, allowing masters to access up to 65,536 individual control registers per PMIC. 2. Bus Arbitration mipi spmi specification pdf
defines a high-speed, low-latency, two-wire serial interface that connects a System-on-Chip (SoC) processor to one or more Power Management Integrated Circuits (PMICs). Its primary role is to accurately monitor and dynamically control supply voltages in real time based on the processor's current workload. In technical terms: The Master: Resides within the SoC's integrated Power Controller (PC). The Slave: Resides within the PMIC's voltage regulation systems. Key Technical Features The Slave: Resides within the PMIC's voltage regulation
The latest public version is (older versions: v1.0, v2.0). The official PDF is available to MIPI Alliance members; non-members may access older versions or summaries. available for ASIC and FPGA integration
Several semiconductor IP vendors offer commercial SPMI controller IP blocks that are fully compliant with the v2.0 specification. These cores, available for ASIC and FPGA integration, typically include master or slave implementations that support the complete command set, both device classes, and all arbitration levels. Purchasing a validated IP core can save significant development time and reduce the risk of specification misinterpretation.
: A single bus can support up to 4 masters and 16 logical slave devices.
The PDF alone is dense. Here are tools that help you implement the spec: