Using Simulink

Data Types Supported by Simulink

Simulink supports all built-in MATLAB data types except int64 and uint64. The term built-in data type refers to data types defined by MATLAB itself as opposed to data types defined by MATLAB users. Unless otherwise specified, the term data type in the Simulink documentation refers to built-in data types. The following table lists the built-in MATLAB data types supported by Simulink.

Name	Description
double	Double-precision floating point
single	Single-precision floating point
int8	Signed 8-bit integer
uint8	Unsigned 8-bit integer
int16	Signed 16-bit integer
uint16	Unsigned 16-bit integer
int32	Signed 32-bit integer
uint32	Unsigned 32-bit integer

Besides the built-in types, Simulink defines a boolean (1 or 0) type, instances of which are represented internally by uint8 values. Some Simulink blocks also support fixed-point data types. See Simulink Blocks in the online Simulink documentation for information on the data types supported by specific blocks for parameter and input and output values. If the documentation for a block does not specify a data type, the block inputs or outputs only data of type double.

Fixed-Point Data

Simulink allows you to create models that use fixed-point numbers to represent signals and parameter values. The use of fixed-point data in a model can significantly reduce the size and increase the speed of code generated from the model. See the documentation for the Fixed-Point Blockset for more information on creating and running fixed-point models.

Working with Data Types

Block Support for Data and Numeric Signal Types