Why is there higher than expected FPGA resource utilization when instantiating the RAM: 2-Port Intel® FPGA IP with the Emulated TDP dual clock mode parameter enabled?

Description

When a RAM: 2-Port Intel® FPGA IP with the Emulated TDP dual clock mode parameter enabled is instantiated in the Intel® Quartus® Prime Software, you might see a higher-than-expected FPGA resource utilization when targeting Intel® Stratix® 10 devices. This is caused by the additional FIFOs implemented by the RAM: 2-Port Intel® FPGA IP.

Resolution

To work around this problem, perform the following steps:

1. Navigate through the hierarchy and find the fifo_wrapper_in instance.
2. Move on through the hierarchy until you come across the dcfifo_component instance.
3. Reduce the value of the LPM_NUMWORDS and LPM_WIDTHU parameters. The value assigned for LPM_NUMWORDS must comply with the following equation: 2^LPM_WIDTHU. Make sure the FIFO depth is appropriate to support the data rate of your design.

As an example:                

dcfifo_component.lpm_numwords  = 16                

dcfifo_component.lpm_widthu  = 4

4. Repeat steps 1 to 3 for the fifo_wrapper_out instance.