Achronix Speedster22i User Macro Guide - Manual (Page 188)

Speedster22i Macro Cell Library Achronix Semiconductor Proprietary PAGE 171
Chapter 7 – Multipliers
BMACC56
28 x 28 Multiplier / Accumulator
a[27:0]
ce_a
rst_a
b[27:0]
ce_b
rst_b
mask_adda
ce_mask_adda
rst_mask_adda
sub
ce_sub
rst_sub
cin
ce_cin
rst_cin
cascade_in[55:0]
cascade_out[55:0]
clk
dout[55:0]
cout
ce_dout
rst_dout
BMACC56
Figure 7-1: Logic Symbol
The Multiplier / Accumulator (BMACC56) block implements a signed 28x28 multiplier
followed by an optional accumulator block. The multiplier produces a 56‐bit adder result
which is fed into the 56‐bit accumulator.