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DM 3730不能从SD启动

Other Parts Discussed in Thread: TPS65930, DM3730

我们为华为公司设计了一款产品,使用了DM3730与TPS65930解决方案。现在电路板出现了故障,现象如下:

1.TPS65930三个核心电压1.2V 1.2V和1.8V输出正常;

2.boot脚配置没问题,26M和32K时钟输出正常;

3.VMMC1电压输出为3.0V;

4.插上SD卡后串口没有打印信息,总的功耗增加480mW ,我们不能检测到 vmmc_clk 和 vmmc_cmd 。

附件中是我们相关部分的设计原理图。

DM3730_TPS65930_SD card.pdf