ERROR: DDR clock (MCLK cycle 625 ps) is fater than DIMM can support.

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ERROR: DDR clock (MCLK cycle 625 ps) is fater than DIMM can support.

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Contributor III

on lx2160ardb-rev2 board,  DDR is   16GB 2RX8 PC4-3200AA-EZZZ-11,  but  now we design a new board,  use DDR  4GB 1RX16 PC4-2400T-UC0-11,    boot message of UART1   is  

NOTICE: UDIMM HMA851U6AFR6N-UH
ERROR: DDR clock (MCLK cycle 625 ps) is fater than DIMM can support.
ERROR: cas latency is too large 42
ERROR: Calculating DDR registers failed
ERROR: Calculate register error

so  what DDR we can use ??

Thanks!

 

but 2400t DDR4  is slower than PC4-3200AA,  what DDR4  can I use ?

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Contributor III

this problem have been resolved.thanks

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127 Views
Contributor III

 

I need to faster DDR frequency,  because 2400MT/S is slower than 3200MT/S.  

or slower DDR DIMM to 2400MT/S.

maybe,  I want more to know how can I change the DIMM to 2400MT/s ???

need to change RCW config ?   or change the  ATF code ??

what should I change ???  

Thanks!

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137 Views
NXP TechSupport
NXP TechSupport

Your board is set to run DDR memory at 3200MT/s speed, however your memory module supports 2400MT/s speed maximum, this causes the error. So you need either to use faster UDIMM, or changes settings to slower DDR frequency.

Regards,

Bulat

 

 

128 Views
Contributor III

Hi Bulat: thanks for your help.. I need to faster DDR frequency,  because 2400MT/S is slower than 3200MT/S.   or slower DDR DIMM to 2400MT/S. maybe,  I want more to know how can I change the DIMM to 2400MT/s ??? need to change RCW config ?   or change the  ATF code ?? what should I change ???   Thanks!

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