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Field LINEN reader - LIN mode enable This bit is set and cleared by software. The LIN mode enables the capability to send LIN synchronous breaks (13 low bits) using the SBKRQ bit in the USART_CR1 register, and to detect LIN Sync breaks. This bitfield can only be written when the USART is disabled (UEÂ =Â 0). Note: If the USART does not support LIN mode, this bit is reserved and must be kept at reset value. Refer to .