A logic option that allows the Compiler to automatically create chains of parallel expander product terms. Parallel expanders are available in macrocells, that is, embedded cells within an Embedded System Block (ESB) that is set to use Product Term mode. The length of the chains is controlled with the Parallel Expander Chain Length option.

This option is ignored if it is assigned to anything other than a design entity. The Auto Parallel Expanders option is also ignored if you select LUT or ROM as the setting for the Technology Mapper option. This option is available for APEX^™ 20K, APEX 20KC, APEX 20KE, APEX^™ II, ARM^®-based Excalibur^™, MAX^® 3000, MAX 7000AE, and MAX 7000B devices.