2401f5f89e
CFAR pipeline fix (clk_100m WNS: -0.331ns → +0.156ns): - Pre-register col_buf reads during ST_CFAR_THR pipeline stage - 8 pipeline registers (4 values + 4 valids) break 15-level mux tree - Delta wires use registered values, eliminating combinatorial depth CIC reset path fix (clk_mmcm_out0 WNS: -0.074ns → +0.068ns): - Add reset_h input port to cic_decimator_4x_enhanced.v - Remove internal wire reset_h = ~reset_n (LUT1 inverter was root cause) - Wire pre-registered reset_400m from ddc_400m.v into both CIC instances - 3 sync reset blocks changed from if(!reset_n) to if(reset_h) Build 19 results (xc7a50tftg256-2, Vivado 2025.2): - All 5 clock domains timing met, 0 failing endpoints - WNS: +0.068ns (400MHz), +0.156ns (100MHz), +0.627ns (120MHz) - Utilization: 66.67% LUT, 22.36% FF, 74% BRAM, 93.33% DSP - Bitstream: 2,140 KB