Thank you for your information. I've read the description of the product(RSC-364) from sensoryinc, and I believe that chip is designed not to be able to interface with other microcontroller. In my project, I use Motorola 68HC11E2 microcontroller as the main brain. Does that RSC-364 suitable for interfacing with Motorola microcontrollers? One more thing, do I have to programme that chip using sensoryinc own source code? If so, then I should have the development kit together with that RSC-364,right?