A Lightweight and Reliable Sideband Interface for Die-to-Die

To satisfy the low-power, low-cost and reliability requirements of the industrial control and intellisense applications, a lightweight sideband interface as well as protocol applied in die-to-die interface is proposed. It utilizes a simplified Management Data Input/Output protocol that supports parameter exchange and event communication with only two pins and half-duplex communication. Moreover, the proposed interface not only allows die-to-die communication after powerup without initialization and setup but also does not depend on the main-band. Therefore, it can play the role of emergency channel to improve the reliability of Die-to-Die. According to the synthesized result, the both-side equivalent gate count is 2400, while the leakage power is 140.19nW.