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TUSB320LAI: 软件或硬件上需要怎么设置才能给IPAD充电

Part Number: TUSB320LAI

已经将TUSB320LAI 配置成I2C mode, 并可以通过IRQ方式触发 并成功判别DFP/UFP,

已经将current设置3A, 可以给手机充电,但达不到3A的level,也不能给IPAD充电.