Issue No. 03 - May/June (1987 vol. 4)
David Ditzel , AT&T Bell Laboratories
Alan Berenbaum , AT&T Information Systems
CRISP is a high-performance 32-bit RISC microprocessor that uses 172,163 transistors in a 1.75?m CMOS technology. The largechip size of 10.35 mmx 12.23 mm and complexity of the design required an extensive top-down approach in a set of integrateddesign tools. CAD tools ranged from an instruction set interpreter to detailed timing simulation. Practical problems encounteredinclude communication among different tools and limits on process size, file size, and total compute time. Use of both symboliccompaction and physical layout, while improving initial efficiency, created problems later in the design.
D. Ditzel and A. Berenbaum, "Using CAD Tools in the Design of CRISP," in IEEE Design & Test of Computers, vol. 4, no. , pp. 21-31, 1987.