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Split entity and architecture

Number of files entity and architecture code is written to

Model Configuration Pane: Global Settings / General


Specify whether generated VHDL® entity and architecture code is written to a single VHDL file or to separate files.


This option is enabled when the target language (specified by the Language option) is VHDL.

Selecting this option enables the following parameters:

  • Split entity file postfix

  • Split architecture file postfix

You can specify an empty character vector for either the Split arch file postfix or the Split entity file postfix. Both VHDL entity and architecture files cannot have empty postfix values. When you specify both values, make sure that you use different values for the Split entity file postfix and the Split arch file postfix.

If you input special characters for the Split entity file postfix or the Split arch file postfix, the code generator changes the entity name or the architecture name to a valid HDL name before generating code.


off (default) | on

Default: Off


VHDL entity and architecture definitions are written to separate files.


VHDL entity and architecture code is written to a single VHDL file.


To set this property, use the functions hdlset_param or makehdl. To view the property value, use the function hdlget_param.

For example:

  • Pass the property as an argument to the makehdl function.

  • When you use hdlset_param, you can set the parameter on the model and then generate HDL code using makehdl.


The names of the entity and architecture files derive from the base file name (as specified by the generating model or subsystem name). By default, postfix strings identifying the file as an entity (_entity) or architecture (_arch) are appended to the base file name. You can override the default and specify your own postfix as a character vector.

For example, instead of all generated code residing in MyFIR.vhd, you can specify that the code reside in MyFIR_entity.vhd and MyFIR_arch.vhd.

Recommended Settings

No recommended settings.

Programmatic Use

Parameter: SplitEntityArch
Type: character vector
Value: 'on' | 'off'
Default: 'off'

Version History

Introduced in R2012a