
Speedster22i Macro Cell Library AchronixSemiconductorProprietary 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 Mu
ltiplier / Accumulator (BMACC56) block implements a signed 28x28 multiplier
followed by an optional accumulator block.The multiplier produces a 56‐bit adder result
whichisfedintothe56‐bitaccumulator.
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