A cardiac pacemaker system and control methods thereof are disclosed, wherein pacing logic and timing functions are enabled by a microprocessor and sensing and pulse delivery capabilities are accomplished by a peripheral IC. The microprocessor communicates with the peripheral IC via serial interfaces and electrical level signals. This allows for full use of internal resources of the modern ultra-low power microprocessor, lowering the dependence of the system on the peripheral IC and reducing the effort required for digital circuit design.
