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The Reconfigurable Smart Sensory Chip (RSSC) is a powerful tool for fast prototyping sensory microsystems. Innovative design ideas can be quickly realized and tested in hardware without doing time-consuming and expensive silicon fabrication. The RSSC is a large-scale floating-gate based IC containing 8 universal sensor interface blocks, each of which can be configured for voltage sensing, capacitive sensing, or current sensing, and 28 configurable analog blocks. The outputs of the interface circuits can be multiplexed out in a time-division sequence or can be routed to the configurable analog blocks for further analog signal processing or data conversion. With more than 50,000 programmable elements and on-chip programming circuitry, RSSC is an extremely powerful tool to develop and test a great variety of smart sensory microsystems in minutes.