A 0.55V 6.3uW/MHz Arm Cortex-M4 MCU with Adaptive Reverse Body Bias and Single Rail SRAM

An ultra-low-voltage (ULV) Arm ® Cortex ® -M4 MCU in 22FDX technology is presented, operating at 0.55V. The circuit employs adaptive body bias (ABB) in a reverse bias scheme with independent control of NMOS and PMOS device performance and has been implemented using a fully ABB-aware sign-off approac...

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Bibliographic Details
Main Authors: Walter, Dennis, Scharfe, Andre, Oefelein, Alexander, Schraut, Florian, Bauer, Heiner, Csaszar, Farkas, Niebsch, Robert, Schreiter, Jorg, Eisenreich, Holger, Hoppner, Sebastian
Format: Conference Proceeding
Language:English
Subjects:
Adaptive Body Bias
CMOS
FD-SOI
Generators
MOS devices
Program processors
Rails
Random access memory
Reverse Body Bias
SRAM
Temperature measurement
ULV
VLSI
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Summary:An ultra-low-voltage (ULV) Arm ® Cortex ® -M4 MCU in 22FDX technology is presented, operating at 0.55V. The circuit employs adaptive body bias (ABB) in a reverse bias scheme with independent control of NMOS and PMOS device performance and has been implemented using a fully ABB-aware sign-off approach. It contains 256 KiB SRAM based on an area efficient 6T bitcell with ABB capability, enabling single supply operation at 0.55V with high yield. A testchip is validated at wafer test and achieves robust operation at 40MHz frequency with 6.6µW leakage power, 6µW ABB generator power and only 6.3µW/MHz total CoreMark power consumption.
ISSN:2473-4683
DOI:10.1109/COOLCHIPS49199.2020.9097639