A 55nm 1-to-8 bit Configurable 6T SRAM based Computing-in-Memory Unit-Macro for CNN-based AI Edge Processors - Details

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EI Scopus

Abstract：

This　work　presents　a　1-to-8　bit　configurable　SRAM　CIM　unit-macro　using　(1)　a　hybrid　structure　combining　6T-SRAM　in-memory　binary　product-sum　(IMBPS)　with　digital　near-memory-computing　multi-bit-PS　accumulation　(DNMPSA)　to　achieve　high　read　accuracy　and　compact　area,　(2)　a　column-based　place-value-grouped　weight　mapping　(CPVGWM)　and　serial-bit　input　mapping　(SBIN)　scheme　to　facilitate　reconfiguration　and　increase　array　efficiency　for　various　input/weight　precision.　A　4Kb　configurable　6T-SRAM　CIM　unit-macro　was　fabricated　using　a　55nm　CMOS　process　and　foundry　6T　cells.　The　resulting　macro　achieved　3.5ns　access　time　with　3b　PS　outputs　and　gained　a　3.91-50x　improvement　in　figure-of-merit,　compared　to　previous　SRAM-CIMs.　©　2019　IEEE.

Keyword：

Mapping Static random access storage

Community：

[ 1 ] [Zhang, Zhixiao]National Tsing Hua University, Hsinchu, Taiwan
[ 2 ] [Zhang, Zhixiao]Fuzhou University, Fuzhou, China
[ 3 ] [Chen, Jia-Jing]National Tsing Hua University, Hsinchu, Taiwan
[ 4 ] [Si, Xin]National Tsing Hua University, Hsinchu, Taiwan
[ 5 ] [Tu, Yung-Ning]National Tsing Hua University, Hsinchu, Taiwan
[ 6 ] [Su, Jian-Wei]National Tsing Hua University, Hsinchu, Taiwan
[ 7 ] [Su, Jian-Wei]Industrial Technology Research Institute, Hsinchu, Taiwan
[ 8 ] [Huang, Wei-Hsing]National Tsing Hua University, Hsinchu, Taiwan
[ 9 ] [Wang, Jing-Hong]National Tsing Hua University, Hsinchu, Taiwan
[ 10 ] [Wei, Wei-Chen]National Tsing Hua University, Hsinchu, Taiwan
[ 11 ] [Chiu, Yen-Cheng]National Tsing Hua University, Hsinchu, Taiwan
[ 12 ] [Hong, Je-Min]National Tsing Hua University, Hsinchu, Taiwan
[ 13 ] [Sheu, Shyh-Shyuan]Industrial Technology Research Institute, Hsinchu, Taiwan
[ 14 ] [Li, Sih-Han]Industrial Technology Research Institute, Hsinchu, Taiwan
[ 15 ] [Liu, Ren-Shuo]National Tsing Hua University, Hsinchu, Taiwan
[ 16 ] [Hsieh, Chih-Cheng]National Tsing Hua University, Hsinchu, Taiwan
[ 17 ] [Tang, Kea-Tiong]National Tsing Hua University, Hsinchu, Taiwan
[ 18 ] [Chang, Meng-Fan]National Tsing Hua University, Hsinchu, Taiwan