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Field TC reader - Transmission complete This bit is set by hardware if the transmission of a frame containing data is complete and if TXFF is set. An interrupt is generated if TCIEÂ =Â 1 in the LPUART_CR1 register. It is cleared by software, writing 1 to the TCCF in the LPUART_ICR register or by a write to the LPUART_TDR register. An interrupt is generated if TCIEÂ =Â 1 in the LPUART_CR1 register. Note: If TE bit is reset and no transmission is on going, the TC bit is set immediately.