AnsweredAssumed Answered

System halt during DDR calibration.

Question asked by danielmi on Jan 23, 2013
Latest reply on Jan 24, 2013 by Vladan Jovanovic

Hey there,


I'm wondering how to properly calibrate the DDR via MMDC once the system is up and running (i.e. after exiting DCD and starting the application).

Directly after my boot ROM copied and started the application code, I initialize my console to see what's up, copy the calibration code to IRAM and start execution of the calibration code.

As soon as I set the MMDC MDSCR register bit CON_REQ to 0x1 (config request) and CMD to 0x2 (auto-refresh) (0x8020), the system seems to halt, I can't even poll the CON_ACK bit.

Any ideas what's going on?