Memory Property on Interface - 2021.2 English

Vitis High-Level Synthesis User Guide (UG1399)

Document ID
UG1399
ft:locale
English (United States)
Release Date
2021-12-15
Version
2021.2 English
The storage_type option on the interface pragma or directive lets the user explicitly define which type of RAM is used, and which RAM ports are created (single-port or dual-port). If no storage_type is specified, Vitis HLS uses:
  • A single-port RAM by default.
  • A dual-port RAM if it reduces the initiation interval or latency.

For the Vivado flow, the user can specify a RAM storage type on the specified interface, replacing the old resource pragma with the storage_type.

#pragma HLS INTERFACE bram port = in1 storage_type=RAM_2P
#pragma HLS INTERFACE bram port = out storage_type=RAM_1P latency=3