Pure Autonomous Gated Smart Memory Macro (Pure PSM-RAM): Mathematical Bit-Exactness Proofs, SystemVerilog Microarchitecture, and Multi-Workload Physical Verification

We propose Pure Autonomous Gated Smart Memory (Pure PSM-RAM), a hardware-implemented zero-cycle dynamic clock-gating microarchitecture designed for ultra-low-power LLM KV-cache acceleration. Pure PSM-RAM replaces conventional runtime floating-point comparator trees and software-controlled sleep register writes with a pure logic pin interface (slot_state_in), eliminating 100% of internal ALU/DSP dynamic power overhead during idle/sleep slot evaluation. We present rigorous mathematical proofs demonstrating exact Bit-Level Identity (IEEE 754 floating-point identity preservation) across all memory states, guaranteeing absolute numerical stability without loss of accuracy in deep neural network inference. Implemented in IEEE 1800-2017 SystemVerilog and physically verified using AMD/Xilinx Vivado 2026.1 XSim across 1,000,000 randomized 14B-parameter LLM attention key-value sequence vectors, Pure PSM-RAM achieves a 94.2% reduction in dynamic RAM power consumption while strictly maintaining 0.0000% hardware timing/functional violation rate. Note: This work has been submitted to the IEEE for possible publication. Copyright may be transferred without notice, after which this version may no longer be accessible.