Hi Juergen,

Juergen Borleis [off-list ref] hat am 24. März 2015 um 21:45
geschrieben:


Stefan Wahren wrote:

quoted

[...]

Maybe you should take into account not to reduce VDD below 1.55 V if the SDRAM
controller runs above 196 MHz. The i.MX28 datasheet[1] lists these
restrictions. VDD powers the SDRAM controller as well. From the datasheet the
table "Frequency versus Voltage for EMICLK" shows:

EMICLK Fmax (MHz)
VDDD (V) DDR2 mDDR
--------------------------------
1.550 205.71 205.71
1.450 196.36 196.36
1.350 196.36 196.36

jbe

[1]
i.MX28 Applications
Processors for Consumer
Products
Silicon Version 1.2

Document Number: IMX28CEC
Rev. 3, 07/2012

thanks for pointing out. I will take care of it.

Stefan
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