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indu_man's avatar
indu_man
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3 years ago

Cyclone IV ISSI 256 Mb flash .jic file not working

Hi, though its an old thread, however we are encountering a similar issue with IS25LP256D flash. This is ISSI 256Mb flash connected with Cyclone IV EP4CGX75 FPGA. Using the blow guidance (in ...
indu_man's avatar
indu_man
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3 years ago

Hi,

I have mentioned the part number of the flash IS25LP256D .

Here is the datasheet link.

https://www.issi.com/WW/pdf/IS25LP(WP)256D.pdf

However, yesterday I found out in the Generic Flash Quartus Programmer User Guide that Cyclone IV only supports 3-bytes addressing.

Hence I concluded (and may be you can confirm ) that the flash of 256 Mb size from ISSI is simple not compatible with the Cyclone IV.

Is there a way around this?

I can try to program the flash to use 3-byte addressing, however in this case the flash size should be 128 Mb. Is there a trick to achieve that the tool (Quartus programming tool) takes it as a 128 Mb flash and not a 256 Mb flash?

Best Regards

Adnan