当输入电压很低且PFI被置位时,仍然能够从I2C寄存器中读取VIN和VSTRG吗?
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只要有VCC就可以读取I2C寄存器。即使没有12V输入,仍然可以通过VB或VSTRG给VCC供电。
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下表供进一步参考:
Hi, Dre.
ADC circuit works after VCC is higher than its UVLO. So If VCC is exist, VIN and VSTRG can be read through corresponding registers after ADC order.