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Spmi | Exclusive

S | CMD+ADDR | S | DATA0 | DATA1 | ... | P

| Feature | SPMI | I²C | SMBus | SPI (w/ PMIC) | |--------------------|---------------|-------------------|------------------|-----------------| | Pins | 2 (SCLK, SDATA) | 2 (SCL, SDA) | 2 | 3+ (CS, MOSI, MISO, CLK) | | Multi-master | Yes | Yes (slow) | Yes | No (without CS mux) | | Max speed | 26 MHz | 5 MHz (Fast Plus) | 1 MHz | 50+ MHz | | Deterministic latency | High (HS mode) | Medium | Low | High | | Hardware sequencing | Yes (commands) | No | No | No | | Typical use | PMIC control | Sensors, EEPROM | Battery, thermal | High-speed peripherals | S | CMD+ADDR | S | DATA0 | DATA1 |

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