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您好，评估板的用户手册有使用说明，第一次连接需要wakeup
Wake-up the device up from shutdown (WAKE)
Press the Wake pushbutton switch (S1) to temporarily connect Bat+ to Pack+. This applies voltage to
the PACK pin on the bq40z80 to power-up the regulators and start the initialization sequence. www.ti.com.cn/.../slua904.pdf
