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поискавой системы для электроныых деталей |
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поискавой системы для электроныых деталей |
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ECP2 датащи(PDF) 25 Page - Lattice Semiconductor |
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ECP2 датащи(HTML) 25 Page - Lattice Semiconductor |
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25 / 386 page  2-22 Architecture Lattice Semiconductor LatticeECP2/M Family Data Sheet • MULT (Multiply) • MAC (Multiply, Accumulate) • MULTADDSUB (Multiply, Addition/Subtraction) • MULTADDSUBSUM (Multiply, Addition/Subtraction, Accumulate) The number of elements available on each block depends in the width selected from the three available options x9, x18, and x36. A number of these elements are concatenated for highly parallel implementations of DSP functions. Table 2-7 shows the capabilities of the block. Table 2-7. Maximum Number of Elements in a Block Some options are available in four elements. The input register in all the elements can be directly loaded or can be loaded as a shift register from previous operand registers. By selecting “dynamic operation” the following opera- tions are possible: • In the ‘Signed/Unsigned’ options the operands can be switched between signed and unsigned on every cycle. • In the ‘Add/Sub’ option the Accumulator can be switched between addition and subtraction on every cycle. • The loading of operands can switch between parallel and serial operations. Width of Multiply x9 x18 x36 MULT 8 4 1 MAC 2 2 — MULTADDSUB 4 2 — MULTADDSUBSUM 2 1 — |
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