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As one of the next-generation information systems, it is important to construct intelligent integrated systems that have quick response for dynamically changing environment. Therefore, it becomes essential to develop the special purpose VLSI processors which are based on the philosophy ""great reduction of the delay time."" Particularly, we call it robot electronics to develop the special purpose VLSI processors for intelligent robot control. In this article, we will review the fundamental technologies such as pipeline architecture, spacial parallel processing, reconfigurable parallel architecture and high level synthesis of the parallel processor with minimum delay time.

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In the sensor feedback control of intelligent robots, the delay time must be reduced for a large number of multioperand multiply-additions. To reduce the delay time for the multiply-additions, switch circuit is used to change the direct connection between the multipliers and adders, so that the overhead in data transfer is reduced. To change the word-length of the multi-operand multiply-adders, in addition, the switches are also provided in multipliers and adders. By changing to the short wordlength, the numbers of multiplier and adders can be increased. The performance evaluation shows that the delay time for visual feedback control becomes about 6 times faster than that of a parallel processor approach using conventional digital signal processor (DSPs).