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DLP3010 lc公板TRIG OUT触发问题

Other Parts Discussed in Thread: DLP3010LC

您好,在使用ti的DLP3010LC产品时,想用相机来拍下dlp的投影,使用trig out2接口,电压选择为3.3v,在接入相机前,用示波器看电影,触发电压为3.3v,但是接入相机,触发电压就只有1.2v左右,带不动相机。(只做相机的触发输入,相机usb供电)

想请问啥原因