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TMS570LC4357: ESMSSR2 and ESMSR2

mingxi liu
Intellectual 381 points
Part Number: TMS570LC4357


王工您好：

          我看手册，想咨询一下：

          1） ESMSR2和ESMSSR2有什么区别？ESMSSR2起什么作用啊？

          2）手册上说：ESMSSR2, which maintains the error flags of Group2 until power-on reset (PORRST) is asserted.，这句话的意思ESMSSR2里的状态在下次上电后还存在吗？

          3）为什么group1和group3没有影子状态寄存器（tatus Shadow Register ）？

  • 0
    TI__Guru**** 198766 points
    mingxi liu said:
    1） ESMSR2和ESMSSR2有什么区别？ESMSSR2起什么作用啊？

    ESMSR2 is cleared after warm reset. ESMSSR2 is status shadow register. It maintains the error flags of Group2 until power-on reset (PORRST) is asserted

    mingxi liu said:
    2）手册上说：ESMSSR2, which maintains the error flags of Group2 until power-on reset (PORRST) is asserted.，这句话的意思ESMSSR2里的状态在下次上电后还存在吗？

    Yes, your understanding is correct.

    mingxi liu said:
    3）为什么group1和group3没有影子状态寄存器（tatus Shadow Register ）？

    There is no shadow registers for ESMSR1 and ESMSR3. I don't know why. 

  • 0 in reply to QJ Wang
    Intellectual 381 points

    王工：

          我还是想问一下，ESMSSR2里的状态什么时候会消失呢？

          比如：

          1）esm错误发生，ESMSSR2里的状态被置位。

          2）power-on（我理解为断电然后上电，不知道我的理解对不对），此时ESMSSR2里的错误状态还在。

          那么这个错误状态什么时候会消失呢？必须手动清除吗？

  • +1 in reply to mingxi liu
    TI__Guru**** 198766 points

    Hi Mingxi,

    After PORRST, all registers in ESM module will be re-initialized to the default value. All the error status registers including ESMSSR2 are cleared to zero. The warm reset doesn't clear the ESMSSR2 register.