Achronix Speedster22i User Macro Guide Uživatelský manuál stáhnout pdf (Strana 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 Mu

ltiplier / 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.

1 2 ... 183 184 185 186 187 188 189 190 191 192 193 ... 223 224

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Achronix Speedster22i User Macro Guide Uživatelský manuál Strana 188