README.md

AXI4 -> Async SRAM (16-bit) Interface

Github: http://github.com/ultraembedded/cores

This component is a simple memory controller interface for asynchronous SRAM featuring an AXI4 interface.

Limitations

Does not support narrow bursts (i.e where AxSize != 32-bit), hence these signals are not present.

Testing

Verified under simulation, tested on a Xilinx Spartan6 FPGA against an Alliance Memory AS7C34098A 16-bit SRAM (but will work with other 16-bit asynchronous SRAM parts).

Configuration

• parameter WRITE_WAIT_CYCLES - Number of clock cycles to achieve tAW.
• parameter READ_WAIT_CYCLES - Number of clock cycles to achieve tAA.
• parameter WRITE_HOLD_CYCLES - Number of clock cycles to achieve tDH.
• define SUPPORT_FIXED_BURST - Support for fixed AXI4 burst transfers.
• define SUPPORT_WRAP_BURST - Support for wrapping AXI4 burst transfers.

References

• Alliance Memory AS7C34098A