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Quad SPI-3 to SPI-4 Link Layer
Lattice Semiconductor
Bridge Core User’s Guide
Quad SPI-3 to SPI-4 LINK Layer Bridge Core Design Flow
The Quad SPI-3 to SPI-4 Bridge IP Core can be implemented using various methods. The scope of this document
covers only the push-button Graphical User Interface (GUI) ?ow. Figure 9 illustrates the software ?ow model used
when evaluating with the Quad SPI-3 to SPI-4 Bridge core.
Figure 9. Lattice IP Core Evaluation Flow
Start
Install and launch ispLEVER software
Obtain desired IP package (download
Core Evaluation package or purchase
IP package)
Protected
Install IP package
Simulation
Model
IP Core Netlist
Perform functional simulation with
the provided core model
Synthesize top-level design with the
IP black box declaration
Place and route the design
Run static timing analysis
Done
Functional Simulation Under ModelSim (PC Platform) 1
Once the Quad SPI-3 to SPI-4 Bridge core has been downloaded and unzipped to the designated directory, the
core is ready for evaluation. The RTL simulation environment contains a testbench and a simple application that
uses the Quad SPI-3 to SPI-4 Bridge design. The application instantiates the Quad SPI-3 to SPI-4 Bridge core, an
ORCA ORSPI4 module and an ORCA SYSBUS module. The module name of the application is called “qspi3_link”.
The testbench includes a SPI-4 driver, a SPI-4 monitor, an instantiation of the user application and SPI-3 loopback
models. In the simulation many packets of varying length generated by the SPI-4 driver are applied to the receive
side of the SPI-4 bridge. A loopback is implemented at the SPI-3 interface. The packets received at the SPI-4 trans-
mit interface are checked against the packets sent by the SPI-4 driver.
The Quad SPI-3 to SPI-4 Link Layer Bridge design and testbench models have been compiled into the work direc-
tories “source\top”, source\sim”, and “eval\test\*”. The Quad SPI-3 to SPI-4 LINK IP, ORCA4, ORSPI4 and SYS-
1. Note that the pre-compiled ORSPI4 simulation models provided in this IP evaluation package do not work with the OEM version of ModelSim
embedded in the ispLEVER ? v.3.0 software. The full, licensed version of ModelSim is required to run this simulation.
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