FPGA wanted

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--Ray Andraka, P.E. President, the Andraka Consulting Group, Inc.

"They that give up essential liberty to obtain a little temporary safety deserve neither liberty nor safety." -Benjamin Franklin, 1759

I want to use a RTL8019 chip and want to interface it with a SPI bus (datasheet: ftp://210.51.181.211/cn/nic/rtl8019as/spec-8019as.zip). I 'm having trouble finding a good way to make the SPI communication. Someone stated that an FPGA could do the conversion. Maybee you have a better idea?

kind regards Stijn

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Hello Ray,

Can you advice a FPGA that can deliver me the 10 Mbit/s?

thanks Stijn

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Almost any modern FPGA should!

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An FPGA certainly can do the conversion, but you'll have to design the circuit to go in the FPGA to do that conversion. The FPGA can be viewed as a big box of uncommitted logic gates. What you hook them up to do is up to the FPGA designer. 10MBits/sec is achievable with any modern FPGA. Pick one based on your costs and comfort with that FPGA's tools.

Stijn Goris wrote:

--

--Ray Andraka, P.E. President, the Andraka Consulting Group, Inc.

"They that give up essential liberty to obtain a little temporary safety deserve neither liberty nor safety." -Benjamin Franklin, 1759

If this is the only task, a CPLD would be a better fit. IIRC a 8019 is an Ethernet (parallel memory mapped) controller, so you need SPI Adr.Data.RD_WR_Strobes. First steps are to do a pin budget, then define transaction size ( 8/16/24 bits etc ), then how you will map the bus action/direction onto bits inside that frame. Smarter designs can include what amounts to SPI_DMA, where the CPLD can stream data at close to full SPI bandwidth, after being carefully initialised. If it's a 3V system, Xilinx Coolrunner2 devices will draw

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