Block Reference (Fixed-Point Blockset)

Fixed-Point Blockset

Bits

Bit Clear
Set the specified bit of the stored integer to zero

Bit Set
Set the specified bit of the stored integer to one

Bitwise Operator
Perform the specified bitwise operation on the inputs

Shift Arithmetic
Arithmetically shift the bits and/or the radix point of a signal

Calculus

Accumulator
Compute a cumulative sum

Accumulator Resettable
Compute a cumulative sum with external Boolean reset

Accumulator Resettable Limited
Compute a limited cumulative sum with external Boolean reset

Derivative
Compute a discrete time derivative

Difference
Calculate the change in a signal over one time step

Integrator Backward
Perform discrete-time integration of a signal using the backward method

Integrator Backward Resettable
Perform discrete-time integration of a signal using the backward method, with external Boolean reset

Integrator Backward Resettable Limited
Perform discrete-time limited integration of a signal using the backward method, with external Boolean reset

Integrator Forward
Perform discrete-time integration of a signal using the forward method

Integrator Forward Resettable
Perform discrete-time integration of a signal using the forward method, with external Boolean reset

Integrator Forward Resettable Limited
Perform discrete-time limited integration of a signal using the forward method, with external Boolean reset

Integrator Trapezoidal
Perform discrete-time integration of a signal using the trapezoidal method

Integrator Trapezoidal Resettable
Perform discrete-time integration of a signal using the trapezoidal method, with external Boolean reset

Integrator Trapezoidal Resettable Limited
Perform discrete-time limited integration of a signal using the trapezoidal method, with external Boolean reset

Sample Rate Probe
Output weighted sample rate

Sample Time Add
Add the input signal to weighted sample time

Sample Time Divide
Divide the input signal by weighted sample time

Sample Time Multiply
Multiply the input signal by weighted sample time

Sample Time Probe
Output weighted sample time

Sample Time Subtract
Subtract weighted sample time from the input signal

Data Type

Conversion
Convert from one Fixed-Point Blockset data type to another

Conversion Inherited
Convert from one Fixed-Point Blockset data type to another, and inherit the data type and scaling

Data Type Duplicate
Set all inputs to the same data type

Data Type Propagation
Configure the data type and scaling of the propagated signal based on information from the reference signals

Gateway In
Convert a Simulink data type to a Fixed-Point Blockset data type

Gateway In Inherited
Convert a Simulink data type to a Fixed-Point Blockset data type, and inherit the data type and scaling

Gateway Out
Convert a Fixed-Point Blockset data type to a Simulink data type

Scaling Strip
Remove scaling and map to a built in integer

Delays & Holds

Integer Delay
Delay a signal N sample periods

Tapped Delay
Delay a scalar signal multiple sample periods and output all the delayed versions

Unit Delay
Delay a signal one sample period

Unit Delay Enabled
Delay a signal one sample period, if the external enable signal is on

Unit Delay Enabled External IC
Delay a signal one sample period, if the external enable signal is on, with an external initial condition

Unit Delay Enabled Resettable
Delay a signal one sample period, if the external enable signal is on, with an external Boolean reset

Unit Delay Enabled Resettable External IC
Delay a signal one sample period, if the external enable signal is on, with an external Boolean reset and initial condition

Unit Delay External IC
Delay a signal one sample period, with an external initial condition

Unit Delay Resettable
Delay a signal one sample period, with an external Boolean reset

Unit Delay Resettable External IC
Delay a signal one sample period, with an external Boolean reset and initial condition

Unit Delay With Preview Enabled
Output the signal and the signal delayed by one sample period, if the external enable signal is on

Unit Delay With Preview Enabled Resettable
Output the signal and the signal delayed by one sample period, if the external enable signal is on, with an external Boolean reset

Unit Delay With Preview Enabled Resettable External RV
Output the signal and the signal delayed by one sample period, if the external enable signal is on, with an external RV reset

Unit Delay With Preview Resettable
Output the signal and the signal delayed by one sample period, with an external Boolean reset

Unit Delay With Preview Resettable External RV
Output the signal and the signal delayed by one sample period, with an external RV reset

Zero-Order Hold
Implement a zero-order hold of one sample period

Edge Detect

Detect Change
Detect a change in a signal's value

Detect Decrease
Detect a decrease in a signal's value

Detect Fall Negative
Detect a falling edge when the signal's value decreases to a strictly negative value, and its previous value was nonnegative

Detect Fall Nonpositive
Detect a falling edge when the signal's value decreases to a nonpositive value, and its previous value was strictly positive

Detect Increase
Detect an increase in a signal's value

Detect Rise Nonnegative
Detect a rising edge when a signal's value increases to a nonnegative value, and its previous value was strictly negative

Detect Rise Positive
Detect a rising edge when a signal's value increases to a strictly positive value, and its previous value was nonpositive

Filters

Filter Direct Form I
Implement a Direct Form I realization of a filter

Filter Direct Form I Time Varying
Implement a time varying Direct Form I realization of a filter

Filter Direct Form II
Implement a Direct Form II realization of a filter

Filter Direct Form II Time Varying
Implement a time varying Direct Form II realization of a filter

Filter First Order
Implement a discrete-time first order filter

Filter Lead or Lag
Implement a discrete-time lead or lag filter

Filter Real Zero
Implement a discrete time filter that has a real zero and no pole

FIR
Implement a fixed-point finite impulse response (FIR) filter

State-Space
Implement discrete-time state space

Logic & Comparison

Compare to Constant
Determine if a signal is equal to the specified constant

Compare To Zero
Determine if a signal is equal to zero

Interval Test
Determine if a signal is in a specified interval

Interval Test Dynamic
Determine if a signal is in a specified interval

Logical Operator
Perform the specified logical operation on the inputs

Relational Operator
Perform the specified relational operation on the inputs

LookUp

Cosine
Implement a cosine function in fixed-point using a lookup table approach that exploits quarter wave symmetry

Look-Up Table
Approximate a one-dimensional function using a selected lookup method

Look-Up Table Dynamic
Provide a region of zero output

Look-Up Table (2-D)
Approximate a two-dimensional function using a selected lookup method

Sine
Implement a sine function in fixed-point using a lookup table approach that exploits quarter wave symmetry

Math

Abs
Output the absolute value of the input

Add
Add two inputs

Decrement Real World
Decrease the real world value of the signal by one

Decrement Stored Integer
Decrease the stored value of a signal by one

Decrement Time To Zero
Decrease the real world value of the signal by the sample time, but only to zero

Decrement To Zero
Decrease the real world value of a signal by one, but only to zero

Divide
Divide the first input by the second input

Dot Product
Generate the dot product of two input vectors

Gain
Multiply the input by a constant

Increment Real World

Increase the real world value of the signal by one

Increment Stored Integer
Increase the stored integer value of a signal by one

Matrix Gain
Multiply the input by a constant matrix

MinMax
Determine the minimum or maximum input value

MinMax Running Resettable
Determine the minimum or maximum of a signal over time

Multiply
Multiply two inputs

Multiply Matrix
Multiply two input matrices

Product
Multiply or divide inputs

Product of Elements
Collapse the input vector by multiplying all elements

Product of Elements Inverted
Collapse the input vector by dividing all elements

Subtract
Subtract the second input from the first input

Sum
Add or subtract inputs

Sum of Elements
Collapse the input vector by adding all elements

Sum of Elements Negated
Collapse the input vector by subtracting all elements

Unary Minus
Negate the input

Nonlinear

Dead Zone
Provide a region of zero output

Dead Zone Dynamic
Set the input within the bounds to zero

Rate Limiter
Limit the rising and falling rates of the signal

Rate Limiter Dynamic
Limit the rising and falling rates of the signal

Relay
Switch output between two constants

Saturation
Bound the range of the input

Saturation Dynamic
Bound the range of the input

Sign
Indicate the sign of the input

Wrap To Zero
Set output to zero if input is above threshold

Select

Index Vector
Output the element of the input vector that corresponds to the value of the control input

Multi-Port Switch
Switch output between different inputs based on the value of the first input

Switch
Switch output between the first input and the third input based on the value of the second input

Sources

Constant
Generate a constant value

Counter Free

Count up and overflow back to zero after the maximum value possible is reached for the specified number of bits

Counter Limited
Count up, and wrap back to zero after outputting the specified upper limit

Repeating Sequence Interpolated
Output a discrete-time sequence and repeat, interpolating between data points

Repeating Sequence Stair
Output a discrete time sequence and repeat

Block Reference Overview of the Block Reference Pages

Bit Clear	Set the specified bit of the stored integer to zero
Bit Set	Set the specified bit of the stored integer to one
Bitwise Operator	Perform the specified bitwise operation on the inputs
Shift Arithmetic	Arithmetically shift the bits and/or the radix point of a signal

Accumulator	Compute a cumulative sum
Accumulator Resettable	Compute a cumulative sum with external Boolean reset
Accumulator Resettable Limited	Compute a limited cumulative sum with external Boolean reset
Derivative	Compute a discrete time derivative
Difference	Calculate the change in a signal over one time step
Integrator Backward	Perform discrete-time integration of a signal using the backward method
Integrator Backward Resettable	Perform discrete-time integration of a signal using the backward method, with external Boolean reset
Integrator Backward Resettable Limited	Perform discrete-time limited integration of a signal using the backward method, with external Boolean reset
Integrator Forward	Perform discrete-time integration of a signal using the forward method
Integrator Forward Resettable	Perform discrete-time integration of a signal using the forward method, with external Boolean reset
Integrator Forward Resettable Limited	Perform discrete-time limited integration of a signal using the forward method, with external Boolean reset
Integrator Trapezoidal	Perform discrete-time integration of a signal using the trapezoidal method
Integrator Trapezoidal Resettable	Perform discrete-time integration of a signal using the trapezoidal method, with external Boolean reset
Integrator Trapezoidal Resettable Limited	Perform discrete-time limited integration of a signal using the trapezoidal method, with external Boolean reset
Sample Rate Probe	Output weighted sample rate
Sample Time Add	Add the input signal to weighted sample time
Sample Time Divide	Divide the input signal by weighted sample time
Sample Time Multiply	Multiply the input signal by weighted sample time
Sample Time Probe	Output weighted sample time
Sample Time Subtract	Subtract weighted sample time from the input signal

Conversion	Convert from one Fixed-Point Blockset data type to another
Conversion Inherited	Convert from one Fixed-Point Blockset data type to another, and inherit the data type and scaling
Data Type Duplicate	Set all inputs to the same data type
Data Type Propagation	Configure the data type and scaling of the propagated signal based on information from the reference signals
Gateway In	Convert a Simulink data type to a Fixed-Point Blockset data type
Gateway In Inherited	Convert a Simulink data type to a Fixed-Point Blockset data type, and inherit the data type and scaling
Gateway Out	Convert a Fixed-Point Blockset data type to a Simulink data type
Scaling Strip	Remove scaling and map to a built in integer

Integer Delay	Delay a signal N sample periods
Tapped Delay	Delay a scalar signal multiple sample periods and output all the delayed versions
Unit Delay	Delay a signal one sample period
Unit Delay Enabled	Delay a signal one sample period, if the external enable signal is on
Unit Delay Enabled External IC	Delay a signal one sample period, if the external enable signal is on, with an external initial condition
Unit Delay Enabled Resettable	Delay a signal one sample period, if the external enable signal is on, with an external Boolean reset
Unit Delay Enabled Resettable External IC	Delay a signal one sample period, if the external enable signal is on, with an external Boolean reset and initial condition
Unit Delay External IC	Delay a signal one sample period, with an external initial condition
Unit Delay Resettable	Delay a signal one sample period, with an external Boolean reset
Unit Delay Resettable External IC	Delay a signal one sample period, with an external Boolean reset and initial condition
Unit Delay With Preview Enabled	Output the signal and the signal delayed by one sample period, if the external enable signal is on
Unit Delay With Preview Enabled Resettable	Output the signal and the signal delayed by one sample period, if the external enable signal is on, with an external Boolean reset
Unit Delay With Preview Enabled Resettable External RV	Output the signal and the signal delayed by one sample period, if the external enable signal is on, with an external RV reset
Unit Delay With Preview Resettable	Output the signal and the signal delayed by one sample period, with an external Boolean reset
Unit Delay With Preview Resettable External RV	Output the signal and the signal delayed by one sample period, with an external RV reset
Zero-Order Hold	Implement a zero-order hold of one sample period

Detect Change	Detect a change in a signal's value
Detect Decrease	Detect a decrease in a signal's value
Detect Fall Negative	Detect a falling edge when the signal's value decreases to a strictly negative value, and its previous value was nonnegative
Detect Fall Nonpositive	Detect a falling edge when the signal's value decreases to a nonpositive value, and its previous value was strictly positive
Detect Increase	Detect an increase in a signal's value
Detect Rise Nonnegative	Detect a rising edge when a signal's value increases to a nonnegative value, and its previous value was strictly negative
Detect Rise Positive	Detect a rising edge when a signal's value increases to a strictly positive value, and its previous value was nonpositive

Filter Direct Form I	Implement a Direct Form I realization of a filter
Filter Direct Form I Time Varying	Implement a time varying Direct Form I realization of a filter
Filter Direct Form II	Implement a Direct Form II realization of a filter
Filter Direct Form II Time Varying	Implement a time varying Direct Form II realization of a filter
Filter First Order	Implement a discrete-time first order filter
Filter Lead or Lag	Implement a discrete-time lead or lag filter
Filter Real Zero	Implement a discrete time filter that has a real zero and no pole
FIR	Implement a fixed-point finite impulse response (FIR) filter
State-Space	Implement discrete-time state space

Compare to Constant	Determine if a signal is equal to the specified constant
Compare To Zero	Determine if a signal is equal to zero
Interval Test	Determine if a signal is in a specified interval
Interval Test Dynamic	Determine if a signal is in a specified interval
Logical Operator	Perform the specified logical operation on the inputs
Relational Operator	Perform the specified relational operation on the inputs

Cosine	Implement a cosine function in fixed-point using a lookup table approach that exploits quarter wave symmetry
Look-Up Table	Approximate a one-dimensional function using a selected lookup method
Look-Up Table Dynamic	Provide a region of zero output
Look-Up Table (2-D)	Approximate a two-dimensional function using a selected lookup method
Sine	Implement a sine function in fixed-point using a lookup table approach that exploits quarter wave symmetry

Abs	Output the absolute value of the input
Add	Add two inputs
Decrement Real World	Decrease the real world value of the signal by one
Decrement Stored Integer	Decrease the stored value of a signal by one
Decrement Time To Zero	Decrease the real world value of the signal by the sample time, but only to zero
Decrement To Zero	Decrease the real world value of a signal by one, but only to zero
Divide	Divide the first input by the second input
Dot Product	Generate the dot product of two input vectors
Gain	Multiply the input by a constant
Increment Real World	Increase the real world value of the signal by one
Increment Stored Integer	Increase the stored integer value of a signal by one
Matrix Gain	Multiply the input by a constant matrix
MinMax	Determine the minimum or maximum input value
MinMax Running Resettable	Determine the minimum or maximum of a signal over time
Multiply	Multiply two inputs
Multiply Matrix	Multiply two input matrices
Product	Multiply or divide inputs
Product of Elements	Collapse the input vector by multiplying all elements
Product of Elements Inverted	Collapse the input vector by dividing all elements
Subtract	Subtract the second input from the first input
Sum	Add or subtract inputs
Sum of Elements	Collapse the input vector by adding all elements
Sum of Elements Negated	Collapse the input vector by subtracting all elements
Unary Minus	Negate the input

Dead Zone	Provide a region of zero output
Dead Zone Dynamic	Set the input within the bounds to zero
Rate Limiter	Limit the rising and falling rates of the signal
Rate Limiter Dynamic	Limit the rising and falling rates of the signal
Relay	Switch output between two constants
Saturation	Bound the range of the input
Saturation Dynamic	Bound the range of the input
Sign	Indicate the sign of the input
Wrap To Zero	Set output to zero if input is above threshold

Index Vector	Output the element of the input vector that corresponds to the value of the control input
Multi-Port Switch	Switch output between different inputs based on the value of the first input
Switch	Switch output between the first input and the third input based on the value of the second input

Constant	Generate a constant value
Counter Free	Count up and overflow back to zero after the maximum value possible is reached for the specified number of bits
Counter Limited	Count up, and wrap back to zero after outputting the specified upper limit
Repeating Sequence Interpolated	Output a discrete-time sequence and repeat, interpolating between data points
Repeating Sequence Stair	Output a discrete time sequence and repeat