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Designing via-configurable logic blocks for regular fabric

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2 Author(s)
Y. Ran ; Clear Shape Technol. Inc., Sunnyvale, CA, USA ; M. Marek-Sadowska

In this paper, we describe the design process of a via-configurable logic block for regular fabric. The block consists of a via-configurable functional cell and two via-configurable inverter arrays. A via-configurable functional cell can efficiently implement most commonly used CMOS static cells, and a via-configurable inverter array is efficient in implementing inverters, repeaters, and some pass-transistor logic. The cells have prefabricated transistors, contacts, and M1 wires. The M2 mask is fixed. All of the functions can be realized by customizing only an M1-M2 via mask. We construct a general-purpose fabric based on the via-configurable block and show its great flexibility in implementing a variety of functions. Compared to other fabrics based on look-up tables or programmable logic arrays, our fabric has much higher performance, smaller area, and lower power consumption.

Published in:

IEEE Transactions on Very Large Scale Integration (VLSI) Systems  (Volume:14 ,  Issue: 1 )