FPGA Intellectual Property
PCI Express*, Networking and Connectivity, Memory Interfaces, DSP IP, and Video IP
Announcements
Intel Support hours are Monday-Fridays, 8am-5pm PST, except Holidays. Thanks to our community members who provide support during our down time or before we get to your questions. We appreciate you!

Need Forum Guidance? Click here
Search our FPGA Knowledge Articles here.
5954 Discussions

help:DDR2 can't init done

Altera_Forum
Honored Contributor II
2,408 Views

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)?
0 Kudos
13 Replies
Altera_Forum
Honored Contributor II
122 Views

Disable Calibration in Megawizard window

Altera_Forum
Honored Contributor II
122 Views

thank you ! 

but I can't understand,
Altera_Forum
Honored Contributor II
122 Views

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

Altera_Forum
Honored Contributor II
122 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 II
122 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 II
122 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 II
122 Views

only change the FPGA and PCB

Altera_Forum
Honored Contributor II
122 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 II
122 Views

Check clocks

Altera_Forum
Honored Contributor II
122 Views

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

Altera_Forum
Honored Contributor II
122 Views

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

Altera_Forum
Honored Contributor II
122 Views

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

Altera_Forum
Honored Contributor II
122 Views

 

--- Quote Start ---  

Disable Calibration in Megawizard window 

--- Quote End ---  

 

 

Hi! 

Is the calibration only for simulation?
Reply