Implements error checking (even/odd parity) and receiver acknowledgment.
Unlike simpler interfaces like I2C, SPMI natively supports multiple masters. For example, both an Application Processor (AP) and a cellular modem can act as independent masters on the same SPMI bus, allowing each to manage its respective power domains autonomously. Initiate transactions and drive the clock. mipi spmi specification pdf
Various third‑party websites—such as CSDN (a Chinese technical community), GitCode, and other file‑sharing platforms—host MIPI specification files, including drafts of the SPMI specification. Some of these resources claim to be “complete” collections of MIPI specifications. mipi spmi specification pdf
Operates at clock frequencies up to 26 MHz. mipi spmi specification pdf
The specification defines various command sizes to optimize bandwidth: