I had used the Microchip PIC16F688 for many applications up to now such as Motion Control, Remote Control, Sony PS1 keypad emulator, etc. I came across a tear down for Nike+ product and it is interesting to find Microchip PIC16F688 on board. The PIC16F688 is used to control the Nordic RF transmitter, nRF402. The communication between these two devices are via Serial Peripheral Interface or in short SPI.
Next topic I will discuss further on SPI communication, different mode of SPI and all. See ya next time......
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