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Eugeny_Brychkov's avatar
Eugeny_Brychkov
Icon for New Contributor rankNew Contributor
7 years ago

Cyclone III: unable to reconfigure after CRC error

Situation: configuration serial flash chip (EPCS16) contains several images, let's say at sector 0x00 (factory), then at sector 0x08 (app1), and at sector 0x10 (app2). Area starting sector 0x18 is al...
YuanLi_S_Intel's avatar
YuanLi_S_Intel
Icon for Regular Contributor rankRegular Contributor
7 years ago

Hi Eugeny Brychkov,

When configuration error occurs, the "nStatus" signal will be pulled low and thus no configuration can be done after that. To enable configuration, you will need to manually pulse "nCONFIG" low for at least 500 ns to restart configuration.

https://www.intel.com/content/dam/www/programmable/us/en/pdfs/literature/hb/cyc3/cyclone3_handbook.pdf (Page 167)

However, you may enable the Auto-restart configuration after error option (available in the Quartus II software from the General tab of the Device and Pin Options dialog box), so that the Cyclone III device family releases nSTATUS after a reset time-out period (a maximum of 230 s), and this can retries configuration.

Regards,

YL