Are you and need help with the physical layout (trace impedance, etc.)? Are you writing a Linux driver for an SPMI controller?
The MIPI SPMI protocol stands out because it replaces legacy, custom point-to-point interfaces with a more efficient shared bus architecture. Key specifications include: Two-Wire Interface: Uses only two signals: (bidirectional serial data) and (unidirectional serial clock). Scalability: Supports up to on a single bus. Speed Classes: Offers two classifications: Low Speed (LS): 32 kHz to 15 MHz. High Speed (HS): 32 kHz to 26 MHz. Low Power Consumption: mipi spmi specification pdf
The PDF explains that SPMI is optimized for —a PMIC must react in microseconds to a voltage change request. I2C’s multi-master handling is too slow and ambiguous for this use case. Are you and need help with the physical
Managing the power rails for 5G modems, high-resolution displays, and multi-core CPUs requires constant, high-speed adjustments to prevent overheating. Wearable Technology High Speed (HS): 32 kHz to 26 MHz
The PDF details:
The MIPI SPMI specification offers several benefits, including: