TDDI (Touch and Display Driver Integration) is a device that integrates two functions into one device. One function is as display driver IC and a second function is as a touch screen controller. For scaling to larger screen sizes for automotive applications with a TDDI architecture, multiple TDDI chips are needed due to the fan out of the required signals for supporting the display and integrated touch screen. However, in the case of TDDI multi‐chip architecture, synchronization among the plurality of chips becomes the key factor in order to achieve uniform picture quality and accurate touch response. For this paper we introduce techniques for synchronization for both the display and the touch function among a plurality of chips (TDDIs). In closing we have successfully achieved a cascaded TDDI architecture by this technique for a fully integrated automotive display and touch solution.