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tps65950 LEDA 设置为PWM问题

Other Parts Discussed in Thread: TPS65950

照手册设置TPS65950如下寄存器

  VIBRA_CTL =  0

    LEDEN= 0x11

    PWMAON = 63

    PWMAON  = 127

但没有Pwm信号输出,请问是设置问题还是其他原因引起的?