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the error  of the sd with qsb program

Question asked by yan jianping on Jan 3, 2013
Latest reply on Jan 9, 2013 by yan jianping
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i designed one design that is full of references to the QSB,.and

one board can boot from sd and works fine,but the other board is

not ok .i uused the external power boxeri to supply the power and

the power is 12v,and i used one dc-dc to make 5v.if not plug the

sd into the socket,the power is 12v,but when plug the sd into the

socket ,the power is down to 5v.and when i plug the sd (no

program) into the socket, the power is 12v and all power of the

imx53 is fine .so i want to know what happens .thanks a lot !