3.16. 64-bit to 32-bit downsizer

The AHB downsizer module, Downsizer64, converts 64-bit wide AHB master data buses to narrower 32-bit slave AHB data buses. The downsizer module reduces the width of the data bus by half from an AHB master to an AHB slave. You can use full-width master transfers. This process involves modification of the transfer type, burst, and size, and latching half of the master read data. In addition, multiple slave writes or reads might be required to transfer data to and from the narrow slave.

Figure 3.40 shows the signal interface of the downsizer module.

Figure 3.40. Downsizer module

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