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A 4-MB on-chip L2 cache for a 90-nm 1.6-GHz 64-bit microprocessor

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17 Author(s)
H. McIntyre ; Sun Microsyst. Inc., Sunnyvale, CA, USA ; D. Wendell ; K. J. Lin ; P. Kaushik
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A 4-MB L2 data cache was implemented for a 64-bit 1.6-GHz SPARC(r) RISC microprocessor. Static sense amplifiers were used in the SRAM arrays and for global data repeaters, resulting in robust and flexible timing operation. Elimination of the global clock grid over the SRAM array saves power, enabled by combining the clock information with array select signals. Redundancy was implemented flexibly, with shift circuits outside the main data array for area efficiency. The chip integrates 315 million transistors and uses an 8-metal-layer 90-nm CMOS process.

Published in:

IEEE Journal of Solid-State Circuits  (Volume:40 ,  Issue: 1 )