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Hi Bien_van_khat,
Ban review lai datasheet cua DSPIC ban xai, neu chan nao cho phep open drain output thi ban co the dung dien tro pull up len +5V. Theo kinh nghiem cua minh thi hinh nhu may chan PWM cua dspic33f dieu cho phep open drain, ban nho config thanh ghi open drain truoc khi xai nhe.
Hi Vong giup duoc ban.
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