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Altera_Forum
Honored Contributor I
2,360 Views

help: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)?
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13 Replies
Altera_Forum
Honored Contributor I
74 Views

Disable Calibration in Megawizard window

Altera_Forum
Honored Contributor I
74 Views

thank you ! 

but I can't understand,
Altera_Forum
Honored Contributor I
74 Views

Can you simulate your design? Archive your project and send to bekrenyov@mail.ru

Altera_Forum
Honored Contributor I
74 Views

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
Honored Contributor I
74 Views

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
Honored Contributor I
74 Views

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
Honored Contributor I
74 Views

only change the FPGA and PCB

Altera_Forum
Honored Contributor I
74 Views

hi: 

I find the DDR2 core"cs_n,ras_n,cas_n" is always low .but the sucessful porject is pulse .
Altera_Forum
Honored Contributor I
74 Views

Check clocks

Altera_Forum
Honored Contributor I
74 Views

when I use signaltop capture the clock it is low,but use oscilloscope it is right"192Mhz"

Altera_Forum
Honored Contributor I
74 Views

Which frequency do you use for SignalTap? You can't see clock which have greater frequency than SignalTap clk

Altera_Forum
Honored Contributor I
74 Views

I use 250 Mhz,can't capture cas_n,ras_n,and cs_n,clk.

Altera_Forum
Honored Contributor I
74 Views

 

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Disable Calibration in Megawizard window 

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Hi! 

Is the calibration only for simulation?
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