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Ultra Low Power Battery Powered MSP430 Development Board with Sharp Memory LCD graphic display. |
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 FFTD1A using < 15µW to maintain an RTC & display |
For more information Download the FFTD1A User Guide |
DescriptionThe FFTD1A development board combines two complimentary parts. A Texas Instruments MSP430F5418A microcontroller and a Sharp LS013B7DH03 128x128 graphic display. The result is a development platform targeting ultra-low-power applications. If you are not familiar with the LS013B7DH03 Memory LCD, the ultra-low-power label is well deserved. Not only is the display refresh flicker-free but it can it hold an image using just a few µW, so combining this part with an MSP430 makes perfect sense. The FFTD1A can typically display an image and maintain a Real Time Clock using less than 15µW. Assuming a CR2032 coin-cell delivers 200mAh, that's nearly 6 years battery life! In a market dominated by displays that are often difficult to read outdoors, the LS013B7DH03 LCD is also unique in providing a high-contrast image in bright sunlight and without the need for a backlight. The FFTD1A board can either be powered directly off a CR2032 coin cell or from an external supply via either of two expansion ports. Note. Any external supply must be regulated to 3.0V. The FFTD1A expansion ports use miniature JST connectors. Port A brings out connections to GND, VDD and universal serial ports UCA1, UCB1. This enables you to interface to many different types of peripheral using either SPI, I2C or RS232 protocols. Port B provides an additional GND and VDD connection plus 2 GPIO ports P2.0/TA1CLK/MCLK and P2.1/TA1.0. These were specifically selected to provide scope for synchronisation with external devices as well as for counting fast pulses and interrupt based triggering. Programming and debug is via the standard 14-Way 0.1" header, compatible with the Texas Instruments MSP-FET430UIF interface. In addition, an RS232 debug port is provided on a 3.5mm jack connector specifically wired for use with FTDI USB to RS232 cables. The design philosophy for the board has been to avoid unnecessary power consumption and clutter by choosing just a few carefully selected peripherals. In addition to the display and expansion ports described above, there are 3 LEDs, 4 tact switches, a 3-Way scan switch and a 3.5mm line-level audio input jack connected to the MSP430's 12 bit ADC. The display and tact switches have been placed on the back so that if you need to mount the board in a box or against a panel, you can do so using the four mounting holes and still have access to the programming port and other electronics. Using the FFT Designer software together with the FFTD1A development board allows users to develop application software that performs Fourier analysis. Users can thus experiment with audio Digital Signal Processing techniques such as might be required for a guitar tuner or simple audio spectrum analyser. The board is shipped ready-programmed with a demonstration application, so you will be up and running within minutes. In addition, the accompanying CD contains four more applications including a demo of using the internal 12 bit ADC to create the oscilloscope and spectrum analyser featured in the video. For anyone wishing to experiment with Fast Fourier Transforms on the MSP430 or create ultra-low-power solutions based on a Sharp Memory LCD, the FFTD1A is simply the best development platform available. Full schematic, bill of materials and demo code are provided on a CD that accompanies the product.
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