A microcontroller (MCU) receives messages from the vehicle network, and makes logic decisions about actions to take, such as charging the supercaps or unlocking the door. The MCU typically also configures the other integrated circuits in the design, monitors the state of health (SOH) of the supercapacitors, and runs diagnostic routines on the motor driver circuitry. This is illustrated in Figure 3-6, showing typical signals for the E-latch functions.

Figure 3-6 Signals To and From the Microcontroller for E-latch Functions

In cases where the E-latch functions are part of a larger electronics control unit, for example a door control unit, the MCU can control many other functions in addition to the E-latch. In these cases, the requirements for the MCU can include higher levels of processing power and expanded peripherals.

Based on typical requirements for processing power, memory and vehicle network capabilities, TI's family of MSP microcontrollers enables engineers to simplify design, reduce system cost, and accelerate time-to-market for next-generation automotive systems. See the wide selection of automotive microcontrollers for body applications at Automotive Body and Lighting MCUs on ti.com .