The memory type can either be user-selected or chosen automatically to suit the best implementation options. Choosing Distributed can result in shift register implementation where appropriate to the filter structure. Inappropriate use of forcing the RAM selection to be either Block or Distributed can lead to inefficient resource usage.
RECOMMENDED: The default Automatic mode is recommended for most implementations.
• Data Buffer Type : Specifies the type of RAM to be used to store data within a MAC element. You can select either Block or Distributed RAM options, or select Automatic to allow the core to choose the memory type appropriately.
• Coefficient Buffer Type : Specifies the type of RAM to be used to store coefficients within a MAC element. You can select either Block or Distributed RAM options, or select Automatic to allow the core to choose the memory type appropriately.
• Input Buffer Type : Specifies the type of RAM to be used to implement the data input buffer, where present. You can select either Block or Distributed RAM options, or select Automatic to allow the core to choose the memory type appropriately.
• Output Buffer Type : Specifies the type of RAM to be used to implement the data output buffer, where present. You can select either Block or Distributed RAM options, or select Automatic to allow the core to choose the memory type appropriately.
• Preference for Other Storage : Specifies the type of RAM to be used to implement general storage in the datapath. You can select either Block or Distributed RAM options, or select Automatic to allow the core to choose the memory type appropriately. Because this covers several different types of storage, it is recommended that you specify this type of memory directly only if you really need to steer the core away from using a particular memory resource (for example, if you are short of block RAMs in your overall design).