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TPS65910AA1初始输出是否正常?

Other Parts Discussed in Thread: AM3354, TPS65910

我今天刚开始调试电路,AM3354+DDR2+TPS65910AA1,AM3354没有程序,电源芯片加了5V后,给AM3354的MUP、CORE,给DDR2的供电都为0,按了一会儿按键,让引脚PWRON接地(平时接5V上拉的),给AM3354的MUP为1.11V,给AM3354的CORE为1.1V,给DDR2的供电为1.79V,保持按键状态,过了一会儿,给AM3354的MUP、CORE,给DDR2的供电又都为0,请问这种状态正不正常?我的QQ:76931958