MCF54418 new DDR SDRAM select

[eric_wu]

     We now use a board based on MCF54418,and its circuit is the same as development board（TWR-MCF5441x (700-26131)）bought from freescale。

     The DDR SDRAM we are using is MT47H128M8CF which Clock Rate is 333MHZ and Cycle Time is 3ns. But now this IC is End Of Life, so we need to select another one MT47H128M8SH-25E,which  AAT Clock Rate is 400MHZ and Cycle Time is 2.5ns.

     My question is what should be changed with software ?

     Thanks very much!

[soledad]

Hello Eric,

The init_hw.c file contains the ram_init function, this function Initializes chip selects and SDRAM controller. You can modify this function according your needs.

The init_hw.c file is located at the path: C:\Freescale\Freescale_MQX_4_2\mqx\source\bsp\twrmcf54418

Have a great day,
Sol

-----------------------------------------------------------------------------------------------------------------------
Note: If this post answers your question, please click the Correct Answer button. Thank you!
-----------------------------------------------------------------------------------------------------------------------