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AM3352 RTC访问程序跑飞

我想问的是,我新做了个AM3352的板子,跟以前的旧板相差不大!但是以访问内部RTC相关的寄存器等等就程序跑飞,指令直接跳到了0x80000010的地方了!如果没有访问RTC相关的东西没有问题正常工作!直接使用TI提供的RTC例程跑也是同样的问题,初始化RTC就跑飞了!这个VDDS_RTC电源1.795伏,量得CAP_VDD_RTC是1.1伏,认为正常。以前旧的板子没有问题可以正常访问RTC。想询问一下关于RTC跑飞的原因....   我认为这个RTC应该只与RTC电源和晶振32k电路有关吧!不知道是不是还有其他机关!!!!

  • 仿真看RTC寄存器,0x44e3e000地址全 是空的,不能访问,访问就跑飞,到底是怎么回事呢???

  • RTC_PWRONRSTn这个管脚忘记布线了,还有救吗?能软件直接修改RTC复位吗??????

  • 8.1.7.9 RTC PORz
    AM335x supports RTC only mode by supplying dedicated power to RTC module. The RTC module has a
    dedicated PORz signal (RTC_PORz) to reset RTC logic and circuitry during powerup. RTC_PORz is
    expected to be driven low when the RTC power supply is ramping up. After the power supply reaches its
    stable value, the RTC_PORz can be de-asserted. The RTC module is not affected by the device PORz.
    Similarly RTC_PORz does not affect the device reset.
    For power-up sequencing with respect to RTC_PORz, see the device specific datasheet.

    这个是在上电的时候进行power on reset的,所以估计是够呛了。