6.1 Enumerate the elements of a basic microcontroller interface and indicate two major criteria for the selection of each. 6.3 An embedded system incorporates an MSP430F2274 clocked by a 4.096MHz at 3.3V, driving two seven-segment displays and two discrete LEDs. The seven segments display draws 7.5mA per segment at 1.8V and the discrete LEDs operate with 10mA each at 1.6V. Three pushbuttons are needed for completing the user interface. Design a suitable interface to connect all LEDs, seven-segments, and pushbuttons. Estimate the circuit power requirements and recommend a non-regulated power supply and a suitable regulator. 6,4 Assume the system described in Problem 6.1 is to be fed from a 4.0V, 2,400mAh lithium battery. Estimate the expected battery life, assuming LEDs are driven dynamically at 30% duty cycle. What would be the regulator efficiency? Determine the MCU thermal dissipation for the given loading conditions and verify if it is operating within a safe temperature range, 6.1 Enumerate the elements of a basic microcontroller interface and indicate two major criteria for the selection of each. 6.3 An embedded system incorporates an MSP430F2274 clocked by a 4.096MHz at 3.3V, driving two seven-segment displays and two discrete LEDs. The seven segments display draws 7.5mA per segment at 1.8V and the discrete LEDs operate with 10mA each at 1.6V. Three pushbuttons are needed for completing the user interface. Design a suitable interface to connect all LEDs, seven-segments, and pushbuttons. Estimate the circuit power requirements and recommend a non-regulated power supply and a suitable regulator. 6,4 Assume the system described in Problem 6.1 is to be fed from a 4.0V, 2,400mAh lithium battery. Estimate the expected battery life, assuming LEDs are driven dynamically at 30% duty cycle. What would be the regulator efficiency? Determine the MCU thermal dissipation for the given loading conditions and verify if it is operating within a safe temperature range