This work presents BP-SCIM: a reconfigurable 8T static random access memory (SRAM) macro for bit-parallel searching and computing in-memory (CIM). The decoupled read/write ports of the employed 8T SRAM bit-cell eliminate read disturbance during search and CIM operations. BP-SCIM can support both in-memory Boolean logic and arithmetic operations. Novel CIM-friendly algorithms and peripheral circuits are proposed to reduce the latency of complex arithmetic operations such as multiplication and division. In addition, BP-SCIM can be configured as either a binary content-addressable memory (CAM) or a ternary CAM for fast searching. A 256×64 BP-SCIM test chip was implemented in 65-nm CMOS technology. The 8-bit addition and 8-bit multiplication operations can achieve the maximum energy efficiency of 3.11 TOPS/W and 0.17 TOPS/W, respectively at 0.7 V supply. For the binary CAM search operation, BP-SCIM can achieve the minimum energy consumption of 0.91 fJ/bit/search at 87 MHz and 0.8 V supply.
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BP-SCIM: A Reconfigurable 8T SRAM Macro for Bit-Parallel Searching and Computing In-Memory
