Altera First-In-First-Out Partitioner - Manual (Page 11)

Altera Corporation 9
Getting Started FIFO Partitioner Megafunction User Guide
Specifying Global Configuration Options
Specify the number of FIFOs you require in the MegaWizard. You can
implement from 2 to 256 FIFOs using the FIFO Partitioner. Because
independent FIFO ports must be time-domain-multiplexed together, the
possible operating frequency of each FIFO port is inversely proportional
to the number of FIFOs specified. See the restrictions on TDM_clk in the
performance section of this document for more information.
Specify whether all FIFOs use the same configuration. If you select this
option, you input width, depth, frequency, and mode information only
once, applying it to all FIFOs. Specify the polarity of the ACLR input
signal (
Figure 3 ).
Figure 3. Global Configuration Options in the FIFO Partitioner MegaWizard
1 You must assert the asynchronous clear for 10 ns or longer before
operating the FIFO Partitioner function.
Specifying FIFO Configurations
Specify the width and depth of each FIFO. Read and write ports of FIFOs
can have different widths. Mixed-widths are supported for FIFOs with
one port up to 72 bits wide. Specify the depth of each FIFO in terms of the
number of bytes of the write port width. The total number of bits used by
a FIFO Partitioned function is displayed in the MegaWizard. You should
not create FIFO Partitioner functions which consume more than 1 M-RAM
block.