SPI Controller - WISHBONE Compatible

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Reference Design LogoThe Serial Peripheral Interface (SPI) bus provides an industry standard interface between microprocessors and other devices as shown in the block diagram below. This reference design documents a SPI WISHBONE controller designed to provide an interface between a microprocessor with a WISHBONE bus and external SPI devices. In master mode, the SPI controller can be configured for communication with multiple off-chip SPI ports. In slave mode, the SPI supports communications with an off-chip SPI master.

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Block Diagram

SPI Controller - WISHBONE Compatible Block Diagram

Performance and Size

Tested Devices* Performance I/O Pins Design Size Revision
LCMXO2280C-5FT256C >70MHz 38 112 LUTs (VHDL)
116 LUTs (Verilog)
LC4256ZE-5MN144C >70MHz 38 95 Macrocells (VHDL)
94 Macrocells (Verilog)
LFXP2-5E-5FT256C >70MHz 38 148 LUTs 1.5

* May work in other devices as well.

Note: The performance and design sizes shown above are estimates only. The actual results may vary depending upon the chosen parameters, timing constraints, and device implementation. See the design's documentation for details. All coding and design work was done on a PC platform unless noted otherwise.


Technical Resources
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SPI WISHBONE Controller - Documentation
RD1044 1.7 3/1/2014 PDF 960 KB
SPI WISHBONE Controller - Source Code
RD1044 1.8 1/12/2015 ZIP 477.7 KB

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