Output selection of contiguous bits from input signal
Simulink / Logic and Bit Operations
HDL Coder / Logic and Bit Operations
The Extract Bits block allows you to output a contiguous selection of bits from the stored integer value of the input signal. Use the Bits to extract parameter to define the method for selecting the output bits.
Select Upper half
to output the half of the input bits that
contain the most significant bit. If there is an odd number of bits in the input
signal, the number of output bits is given by the equation
number of output bits = ceil(number of input bits/2)
Select Lower half
to output the half of the input bits that
contain the least significant bit. If there is an odd number of bits in the
input signal, the number of output bits is given by the equation
number of output bits = ceil(number of input bits/2)
Select Range starting with most significant bit
to output a
certain number of the most significant bits of the input signal. Specify the
number of most significant bits to output in the Number of
bits parameter.
Select Range ending with least significant bit
to output a
certain number of the least significant bits of the input signal. Specify the
number of least significant bits to output in the Number of
bits parameter.
Select Range of bits
to indicate a series of contiguous
bits of the input to output in the Bit indices parameter.
You indicate the range in [start end]
format, and the indices
of the input bits are labeled contiguously starting at 0 for the least
significant bit.
This block does not report wrap on overflow warnings during simulation. To report
these warnings, see the Simulink.restoreDiagnostic
reference
page. The block does report errors due to wrap on overflow.
Data Types 

Direct Feedthrough 

Multidimensional Signals 

VariableSize Signals 

ZeroCrossing Detection 
