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您好，QEN set以后不能清除，请参考下面文档的描述。
15.1.1.23 IT ENABLE: 0x0021
Forces the fuel gauge to begin the Impedance Track algorithm, sets Bit 2 of UpdateStatus and causes
the [VOK] and [QEN] flags to be set in the CONTROL_STATUS register. [VOK] is cleared if the voltages
are not suitable for a Qmax update. Once set, [QEN] cannot be cleared. This command is only available
when the fuel gauge is UNSEALED and is typically enabled at the last step of production after system test
is completed.
