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Altera_Forum
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8 years ago

Arria 10 GX Devkit Programming Issue

When a scan jtag chain is performed on the devkit (all dip switches on default) after an image other than the factory build is programmed to the A10, the configuration flash is no longer seen in the ...
Altera_Forum's avatar
Altera_Forum
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8 years ago

Do you have the Altera SFL (serial flash loader) megafunction instantiated in the device image? The flash devices are NOT directly accessible on JTAG and are attached to the FPGA via high speed serial links. There is logic within the FPGA (the SFL megafunction) that must be instantiated that makes the config flash device appear in the JTAG chain as a virtual JTAG device.

It may very well be some of the sample images don't have this module instantiated, so they don't support JTAG access to the config flash.

Refer to: https://www.altera.com/ja_jp/pdfs/literature/an/an370.pdf for into.