How does the PowerWise Interface (PWI) differ from other industry standard interface solutions on the market like I2C, SPI, and SMBus?
The Powerwise Interface (PWI) is a two-wire serial, open-standard interface which provides an enhanced system power management interconnect between processors (ASICs, SoCs etc.) and energy management ICs or EMUs. The interface is specifically defined to provide high-speed real-time master-to-slave communication. It allows for the control of a voltage regulation system and other peripheral devices. It enables system designers to dynamically adjust the voltage supply on digital processors. The PWI specification defines the required functionality in the PWI-slave; as well as the operating states, the physical interface, the register set, the command set and the data communication protocol for messaging between the PWI-master(s) and the PWI-slave(s). PWI 1.0 is a point-to-point interface while PWI 2.0 is a multi-drop bus interface for 2 masters and up to 16 slave devices. The PWI 2.0 specification maintains the low-power, low-latency, high-bandwidth capabilities of the PWI 1.0 specificatio
