USART: Universal Synchronous/Asynchronous Receiver Transmitter Number of Stop Bits. For SmartCard Mode, it's recommended to choose 1.5 Stop Bits (or 0.5 Stop Bit if receiving only). The value given in the register is multiplied by 2 to give the division factor of the source clock frequency. Uart_Init VM_ASYNC Usart_Init VM_SYNC Uart_HalfDuplex_Init VM_ASYNC Uart_MultiProcessor_Init VM_ASYNC IrDa_Init VM_IRDA Uart_Lin_Init VM_ASYNC SmartCard_Init VM_SMARTCARD SmartCard_Init VM_SMARTCARD VM_SMARTCARD $IpInstance_Asynchronous Asynchronous $IpInstance_Synchronous $IpInstance_IrDA $IpInstance_LIN $IpInstance_SmartCard $IpInstance_SmartCard $IpInstance_T $IpInstance_R $IpInstance_CTS_RTS