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Honored Contributorhelp:DDR2 can't init done
Hello ,
I want to use the MT47H32M16HR-25(D9KHQ DDR2),but I can't find the it in the " Mega Wizard -- > DDR2 SDRAM Control and ALTMPHY ", I use the "MT47H32M16CC - 3" ,and repair the parameter ,but the signal(local_init_done) is low.how can i do ? where can i find the example of DDR2(MT47H32M16HR-25)?13 Replies
Altera_ForumDisable Calibration in Megawizard window
- Altera_Forum
thank you !
but I can't understand, - Altera_Forum
Can you simulate your design? Archive your project and send to [email protected]
- Altera_Forum
thank you :
I use modelsim to simulate DDR2 - core,it is sucessful . I think it is error by configuration IC parameter or PCB hardware - Altera_Forum
May be two reasons of init failure: calibration failure or invalid parameters loaded into DDR registers. If you disable calibration you can determine which problem you have.
- Altera_Forum
thank you!
I do ,but I can't understand what 's wrong : I have a demo hardware of "EP3C120", the project can run sucessfully.it include DDR2 ,PLL and something else. but I use the new hardware "EP3C40F484" ,it is failed . so it is difficulty to find what happen - Altera_Forum
only change the FPGA and PCB
- Altera_Forum
hi：
I find the DDR2 core"cs_n,ras_n,cas_n" is always low .but the sucessful porject is pulse . - Altera_Forum
Check clocks
- Altera_Forum
when I use signaltop capture the clock it is low,but use oscilloscope it is right"192Mhz"
