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MSP430FR5969 LaunchPad Low Power FRAM MCU Part 3 Slide 7

The display shows the following Menu Options: The Clock mode allows the user to set the clock timer in the day/month/year time format. The FRAM Speed mode application shows a counter of high speed writes to FRAM in the order of 8MBps. It also shows a countdown of FRAM endurance based on continuously logging data to FRAM at the rate of 8MBps. Experiment with this mode by charging the super cap and then unplugging the USB cable. Make sure the jumpers connecting the eZFET to the target board are also removed. Now the board is powered solely from the super cap. If the capacitor was previously charged, the device continues to write to FRAM on that charge. This is because FRAM writes have very low peak and average power requirements making it ideal for energy constrained applications. The Battery Free mode allows the user to test RTC when using power from the super cap. Similar to the previous mode make sure the super cap is charged before unplugging the cable, also ensure that the eZFET jumpers are removed the same as before. On a single charge, the board can maintain RTC for over 20 hours. The Active Power mode allows the user to select and experiment with various MCLK and cache hit ratio settings and see it’s impact on active power. The SliderBall Game mode uses both left and right capacitive touch sliders and implements an algorithm based on the MSP430 Capacitive touch sense library.

PTM Published on: 2014-06-24