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AR# 15311

LogiCORE 1024-pt FFT v1.0 - The block RAM configurations in the FFT/IFFT data sheet do not match the hardware configurations

Description

In the FFT/IFFT data sheet, the block RAM (BRAM) configurations do not match the configurations from the hardware.

Solution

In the data sheet for the Virtex FFT/IFFT:

1024 FFT v1.0 data sheet:

- The first full paragraph above Figure 3 states that Virtex BRAMs may be configured as 1024x16, creating the need for 8 BRAMs.

This statement is incorrect -- it should be 1024x4, or 256x16, which creates the need for the 8 Virtex BRAMs.

In the data sheet for the Virtex-II FFT/IFFT:

64 FFT v2.0 data sheet:

- On page 7, the second full paragraph above Figure 3 states that Virtex BRAMs may be configured as 256x16.

This should include the configuration for Virtex-II BRAMs, which is 512x36.

256 FFT v2.0 data sheet:

- On page 7, the second full paragraph above Figure 3 states that Virtex BRAMs may be configured as 256x16.

This should include the configuration for Virtex-II BRAMs, which is 512x36.

1024 FFT v2.0 data sheet:

- On page 7, Figure 3 is incorrectly labeled as requiring 8 Virtex BRAMs.

This label should indicate that 2 Virtex-II BRAMs are required.

- On page 15, the paragraph below Figure 12 states that 24 Virtex BRAMs will be required for TMS mode.

This should state that 6 Virtex-II BRAMs are required for TMS mode.

AR# 15311
Date Created 09/03/2007
Last Updated 12/15/2012
Status Active
Type General Article