LogiCORE 1024-pt FFT v1.0 - The block RAM configurations in the FFT/IFFT data sheet do not match the hardware configurations
Description
Keywords: Virtex, Virtex-II, FFT, IFFT, BRAM, data sheet, datasheet
In the FFT/IFFT data sheet, the block RAM (BRAM) configurations do not match the configurations from the hardware.
Solution
1
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.
2
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.