LS1088ARDB_PB boot with emmc configure as SD ?

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LS1088ARDB_PB boot with emmc configure as SD ?

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Contributor II

Hi,

I have a question about the configuration word.

If I generate an eMMC boot image for ls1088ARDB_PB, I can boot from eMMC  if I use qixis_reset eMMC.

But if I generate an SD boot image for ls1088ARDB_PB, I can boot from eMMC at power-on, and no need to use qixis_reset function.

WHY ?

That means, for my comprehension, that the CFG_RCW_SRC[6:0] can be set to 7'b100_0000 for both eMMC and SD.

In this case, the value 7'b100_0001 is useless.

Do I understand the behaviour correctly or I miss something ?

Thanks,

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NXP TechSupport
NXP TechSupport

You understanding is correct, CFG_RCW_SRC[6:0] configuration can be set to 7'b100_0000 for both eMMC and SD on LS1088ARDB. When you use eMMC boot, please plug off SD card from LS1088ARDB.

87 Views
Contributor II

Thanks,

In our board we will use a LS2044A then my question is :

Can we replicate SD-eMMC desgin from LS1088ARDB (without the cpld) and set configuration word as

CFG_RCW_SRC[6:0] to 7'b100_0000 for both eMMC and SD ?

Thanks,

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87 Views
NXP TechSupport
NXP TechSupport

Please design LS2088A/LS2044A target board according to the reference manual, CFG_RCW_SRC[6:0] = 7'b100_0000 is for booting from a SD 2.0 card; CFG_RCW_SRC[6:0] = 7'b100_0001 is for booting from an eMMC.