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PRTCSS power on DM368

songbai yu
Prodigy 90 points

hi,

   I have a strange problem on DM368，when power on DM368，sometimes it can not boot up，we try change the POWER ON sequence about（1.3V/1.8V/3.3V）,but it have no effect，（by the way，we power supply  PRTCSS  and Core with the same DC-DC at the same time）.

      at last,we remove the  PRTCSS  power(DM368 pin K7,J6floatting),then the DM368 work fine,I want to know why the PRTCSS affect the boot up ? after remove PRTCSS power,we have another problem，when we set BTSEL[2:0]=010(SD BOOT modes)， it can  not boot from SD_Card but NANDfLASH directly,and when we recover PRTCSS power，set BTSEL[2:0]=010，it can boot from SD_Card, Why?

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