Config PROM for Spartan II

Hi all,

at the moment, we are using AT17LV010 configuration devices for a spartan 2S100. I have to look for a different solution which is not so expensive.

The Xilinx XC17V01 is OTP and more expensive than the AT17LV010.

Does someone know a different prom (OTP, EEPROM, Flash)? I don't want to use a pld or microcontroller for active serial programming.

Thanks a lot

Markus

Reply to
Markus Knauss
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Do you need it to be pin compatible or are you re-designing your board? For new designs I would suggest the PlatformFlash series (xcf01s), but these won't come in the same 8-pin packages as the XC17LV01. In addition to being much cheaper, they are JTAG in-system programmable (but beware of issues of you use them ahead of your Spartan 2 in a JTAG chain).

HTH, Gabor

Reply to
Gabor

SST makes a series of VERY cheap serial flash memories. I figured out how to create the command bit stream that it needs to command a read starting from addr zero function, using just 2 SSI CMOS chips in SSOP packages, so the interface is under $1, and the SST chip is well under $2 in small quantities. I had to make my own programmer, and a little C program to read the .MCS file and program the device. I haven't actually produced a product using this setup yet, but I did build a prototype board for Spartan 2E and verify that it could do the FPGA configure. I did this for the 2S50E part, but SST has up to 4 mbit chips, I think, that should handle the 2S100.

Jon

Reply to
Jon Elson

Thank you Jon for the hint. It should be possible to get a preprogrammed 8 bit controller (PIC, AVR) for 1$ and with a little bit banging in software you could use the original .mcs file.

Markus

Reply to
Markus Knauss

Markus: Have you had a chance to discuss pricing with your local Sales Rep ? Another option is a low cost 1 Mbit with JTAG that Atmel should begin sampling in a few weeks.

Yad [Atmel]

Reply to
Atmel_PLDs_Rock

you can get dev-kit for such microcontroller for 5 USD ;)

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and yes there are plenty of sub 1USD microcontroller that can use as SPI to xilinx master serial adapter

mcu holds FPGA in de-config (prog_b low), and clocks in the read instruction into SPI flash, then FPGA released and it will configure at programmed into bitstream clock rate from the SPI flash

Antti

Reply to
Antti

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