As modern electronic devices pack more features into smaller forms, the need for efficient power management becomes paramount. In this context, communication protocols like SPMI and I3C are key enablers. SPMI boasts bi-directional communication, multiple masters, and enhanced security, enabling finer control over multiple power rails and peripheral devices. I3C builds upon these benefits, adding features like error detection and correction, low-power operation, and improved addressing capabilities. Both protocols offer superior data rates and addressing mechanisms compared to I2C, making them prime candidates for efficient power management in the ever-evolving landscape of electronics. This thesis, in collaboration with ST Microelectronics, contributes to the development of an SPMI Request-Capable Slave (RCS) interface by focusing on the design and implementation of an efficient sequence transmitter operating across multiple clock domains.