MATLAB DATABASE TOOLBOX RELEASE NOTES Guide de l'utilisateur Page 207

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New Features
17-3
New Blocks
The Fixed-Point Blockset 3.1 includes the new blocks listed below.
Block Name Library Description
Accumulator Calculus Compute a cumulative sum.
Accumulator Resettable Calculus Compute a cumulative sum with external
Boolean reset.
Accumulator Resettable
Limited
Calculus Compute a limited cumulative sum with
external Boolean reset.
Bit Clear Bits Set the specified bit of the stored integer to
zero.
Bit Set Bits Set the specified bit of the stored integer to one.
Compare To Constant Logic &
Comparison
Determine if a signal is equal to the specified
constant.
Compare To Zero Logic &
Comparison
Determine if a signal is equal to zero.
Cosine LookUp Implement a sine wave in fixed-point using a
lookup table approach that exploits quarter
wave symmetry.
Counter Free Sources Count up and overflow back to zero after the
maximum value possible is reached for the
specified number of bits.
Counter Limited Sources Count up, and wrap back to zero after
outputting the specified upper limit.
Data Type Duplicate Data Type Set all inputs to the same data type.
Dead Zone Dynamic Nonlinear Set the input within the bounds to zero.
Decrement Real World Math Decrease the real world value of the signal by
one
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