• 状态 TI Thinks Resolved
  • 已锁定 已锁定
  • 个回复 3 个回复
  • 答案 1 答案
  • 名订阅用户 43 名订阅用户
  • 次查看 165 次查看
  • 用户 0 名在线用户
选项
选项
相关

This thread has been locked.

If you have a related question, please click the "Ask a related question" button in the top right corner. The newly created question will be automatically linked to this question.

BQ769142: Watch dog相關問題

jimmy shih
Prodigy 30 points
Part Number: BQ769142

你好，

在使用BQ769142上有3個問題想要請教。

1.IC 斷電重新上電,

(1)BQ769142 IC 在第一次上電時寫入新的設定參數，寫入完成後再將BQ769142 IC完全斷電，此時在上電後是否會將原本的設定值變成預設值，還是會維持原本設定值?

2.Watch dog ，

(1)在BQ769142 觸發Watch dog 功能時，技術文件表示是會關掉DSG與CHG MOSFET，想請問當觸發時BQ769142 IC 也會自動Reset嗎? 還是只是關閉DSG與CHG MOSFET而已?

(2)Watch dog 功能可以再進入休眠模式時將其Disable，而從休眠模式喚醒後再將Watch dog功能Enable，這種使用模式是可行的嗎?

在協助回覆，感謝!!

  • 0
    TI__Guru*** 130456 points

    您好，正在查询，稍后回复。

  • 0 回复 Star Xu
    Prodigy 30 points

    你好，

    請問有找到資訊嗎?

    謝謝

  • 0 回复 jimmy shih
    TI__Guru*** 130456 points

    您好，请参考下面内容：

    1， When the device is powered on or woken from SHUTDOWN mode, it will load the settings set in the OTP, and if there is no OTP value set for a register it will load its default value.

    2，The Host Watchdog Protection just turns off the FETs, it will not directly cause the device to reset. The internal watchdog feature (not the same as Host Watchdog Protection) will reset the device. This feature checks if the internal firmware is non-responsive and should only trigger if there is an internal firmware error.

    3，There is not an autonomous function to do this, but the host could detect that the device is in SLEEP mode via 0x12 Battery Status [SLEEP] and then disable the Host Watchdog Protection by changing Settings:Protection:Enabled Protections C [HWDF] to disable/enable the protection. The Internal Watchdog check cannot be disabled.