SSM2529 spk异常发热问题

Hi

我司使用SSM2529验证时,偶现上电后喇叭异常发烫问题,概率大概40%。电路如图。发烫的时候dump寄存器,发现并未报任何错误。前端使用的是Realtek 的ALC4021 将usb转换为i2s信号,然后给到SSM2529。

已经做了如下验证:

1,外供SPKVDD 5V 或者 3.3V 依然偶现发热;

2,多次 RST 依然复现;

3,用BCLK作为2529时钟来源,未复现;

以下是异常时候dump寄存器值


regmap_read reg=0x0 ,val=0x28

regmap_read reg=0x1 ,val=0x21

regmap_read reg=0x2 ,val=0x2

regmap_read reg=0x3 ,val=0x20

regmap_read reg=0x4 ,val=0x10

regmap_read reg=0x5 ,val=0x40

regmap_read reg=0x6 ,val=0x40

regmap_read reg=0x7 ,val=0x20

regmap_read reg=0x8 ,val=0x0

regmap_read reg=0x9 ,val=0x0

regmap_read reg=0xA ,val=0x0

regmap_read reg=0xB ,val=0x0

regmap_read reg=0xC ,val=0x0

regmap_read reg=0xD ,val=0x0

regmap_read reg=0xE ,val=0x31

regmap_read reg=0xF ,val=0x0

regmap_read reg=0xF ,val=0x0

regmap_read reg=0x10 ,val=0x4C

regmap_read reg=0x14 ,val=0x0

regmap_read reg=0x15 ,val=0x0