Fifo Entity Reference

This module provides a simple, single clocked FWFT FIFO. More...

Inheritance diagram for Fifo:

Entities
Behavioral	architecture

Libraries
ieee
unisim
work

Use Clauses
std_logic_1164
numeric_std
vcomponents
NvmeStoragePkg	Package <NvmeStoragePkg>
NvmeStorageIntPkg	Package <NvmeStorageIntPkg>

Generics
Simulate	boolean := False
	Simulation.
DataWidth	integer := 128
	The data width of the Fifo in bits.
Size	integer := 2
	The size of the fifo.
NearFullLevel	integer := 0
	Nearly full level, 0 disables.
RegisterOutputs	boolean := False
	Register the outputs.

Ports
clk	in	std_logic
		The interface clock line.
reset	in	std_logic
		The active high reset line.
nearFull	out	std_logic
		Fifo is nearly full.
inReady	out	std_logic
		Fifo is ready for input.
inValid	in	std_logic
		Data input is valid.
inData	in	std_logic_vector ( DataWidth - 1 downto 0 )
		The input data.
outReady	in	std_logic
		The external logic is ready for output.
outValid	out	std_logic
		The data output is available.
outData	out	std_logic_vector ( DataWidth - 1 downto 0 )
		The output data.

Detailed Description

This module provides a simple, single clocked FWFT FIFO.

Author

Terry Barnaby (terry.nosp@m..bar.nosp@m.naby@.nosp@m.beam.nosp@m..ltd..nosp@m.uk)

Date

2020-08-11

Version

1.0.1

This is a simple single clock first word fall through FIFO. Its data storage memory will be implemented in registers for small Fifo's and in BlockRAM for larger Fifos the Size parameter defining the depth of the Fifo. The data width is defined by the DataWidth parameter. It has a programmable nearFull output that can be enabled by setting the NearFullLevel parameter to the appropriate Fifo level. The RegisterOutputs parameter provides registered output of the data for better system timing at the expense of one cycle of latency.

Copyright

2020 Beam Ltd, Apache License, Version 2.0 Copyright 2020 Beam Ltd Licensed under the Apache License, Version 2.0 (the "License"); you may not use this file except in compliance with the License. You may obtain a copy of the License at http://www.apache.org/licenses/LICENSE-2.0 Unless required by applicable law or agreed to in writing, software distributed under the License is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the License for the specific language governing permissions and limitations under the License.

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The documentation for this class was generated from the following file:

• /src/dune/source/DuneNvme/src/Fifo.vhd