Timeline for Custom FPGA PCB with external programming circuit
Current License: CC BY-SA 3.0
4 events
| when toggle format | what | by | license | comment | |
|---|---|---|---|---|---|
| Nov 28, 2013 at 21:29 | comment | added | technocratic | I've looked through the Altera configuration documentation on the Cyclone V and their configuration signals do not seem SPI compatible. It seems they sell a proprietary configuration device to support their FPGAs. | |
| Nov 28, 2013 at 4:58 | comment | added | markt | Depends on the FPGA. I've used Xilinx, not Altera, so can only comment from that perspective. Xilinx devices can be configured (via pullup/down on config pins) to load themselves from a variety of NV memory devices, including commodity SPI flash, or to wait to be loaded by an MCU or JTAG. It seems likely to me that Altera devices are similar. I would expect there to be doco on the Altera website that explains the configuration options and processes in a fair bit of detail. | |
| Nov 28, 2013 at 2:17 | comment | added | technocratic | If it is just a matter of a single SPI flash device, then that would be the preferred manner. My concern is whether such device can interface directly to the FPGA. Are you saying that the startup signals from the Cyclone is essentially an SPI interface? | |
| Nov 27, 2013 at 21:15 | history | answered | Dave Tweed | CC BY-SA 3.0 |