Memory Property on Interface - 2024.1 English

Vitis High-Level Synthesis User Guide (UG1399)

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2024.1 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 deprecated RESOURCE pragma with the storage_type.

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