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TPL5010 初始状态

Other Parts Discussed in Thread: TPL5010

Dear,

TPL5010 开机如果不执行喂狗操作,经过一个Tip时间就会复位CPU,如果开机执行一次喂狗操作,经过两个Tip复位CPU,请帮忙确认这个测试结果,是否正确

谢谢

  • TPL5010 上电后,内部会自动复位,然后进行one -time measurement 的过程,不确信你开机执行一次喂狗操作, 和Wake/Done 的时序是否满足Datasheet的要求? 建议用示波器测量一下他们之间时序.
  • 有条件的话,把芯片供电电压也一起测一下,把所有波形放在同一张图片中,便于找问题。
  • 开机初始状态请参考 Figure9的时序,另外,watchdog时序在Figure8 中也给出,如果在 T_ip时间内收到DONE脉冲,那么TPL5010会输出一个20ms的 wake up脉冲,否则的话就会输出RSTn脉冲。

    RSTn is asserted (LOW) for either one of the following conditions:
    • 1. If the DELAY/M_RST pin is high for at least two consecutive cycles of the internal oscillator (approximately
    20ms).
    • 2. At the beginning of a new time interval if DONE is not received at least 20 ms before the next WAKE rising
    edge (see Figure 8)