The main topics include executable specifications, program analysis, operational semantics, model-based design, formal methods, real-time programming, dedicated architectures, timing predictability, and controller synthesis. Due to the pandemic, the workshop was held online. Synchronous programming is an established approach for specifying and developing embedded software that needs to react in real-time to its environment and execute on constrained platforms. It is especially relevant to safety-critical embedded applications. The workshop brings together academics and industrial researchers from across the world, with a very strong representation from European countries.