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A 500 MHz, 32 bit, 0.4 μm CMOS RISC processor

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15 Author(s)
Suzuki, K. ; Microelectronics Res. Labs., NEC Corp., Kanagawa, Japan ; Yamashina, M. ; Nakayama, T. ; Izumikawa, M.
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A 500 MHz, 32 bit RISC microprocessor has been experimentally developed using an 8-stage pipelined architecture and high-speed circuits, including a 500 MHz 1 kilobyte double-stage pipelined cache, a 1.8 ns register file, a double-stage binary look-ahead carry (BLC) adder circuit, and a 500 MHz phase locked loop (PLL) frequency multiplier. Newly developed circuit-integrating techniques include a stacked power-line structure, which serves as a noise shield and also provides low bounce, a low voltage-swing interface circuit with on-chip adjustable termination resistors, a small-skew clock distribution method, and a clock synchronization circuit which provides small-skew clock among LSI chips. About 200000 transistors are integrated into a 7.90 mm×8.84 mm die area with 0.4 μm CMOS fabrication technology. Power dissipation is 6 W at a 500 MHz operation and 3.3 V supply voltage

Published in:

Solid-State Circuits, IEEE Journal of  (Volume:29 ,  Issue: 12 )