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Altera_Forum
Honored Contributor
Honored Contributorin-system reconfiguration without JTAG
In a Cyclone IV design with a serial configuration rom, is it possible to reprogram the rom in-system without using either the JTAG pins or using the FPGA to reprogram the rom? I would like to tie into the rom's interface and use a separate device to reprogram it. Thanks for the help.
2 Replies
Altera_ForumYes, like the USB Blaster AS interface does. Deassert nCE and connect to the serial interface through tristate drivers.
- Altera_Forum--- Quote Start --- Yes, like the USB Blaster AS interface does. Deassert nCE and connect to the serial interface through tristate drivers. --- Quote End --- Or use the parallel_asmi primitive, this drives the ASMI interface directly from within the FPGA without using extra user IO. There's a primitive that allows direct connection to the asmi interface I've used in Cyclone I's and III's. I'm not sure if this is available in the IV but the parallel_asmi incprporates a lot of the logic you'd have to implement anyway so you might as well use that! [Edit] Or I could have read the question properly and voted +1 for FvM's solution! [/Edit] Nial.
