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UPSD3422 Datasheet(PDF) 107 Page - STMicroelectronics |
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UPSD3422 Datasheet(HTML) 107 Page - STMicroelectronics |
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107 / 293 page  uPSD34xx Serial UART interfaces 107/293 Figure 33. UART Mode 1, Block Diagram Figure 34. UART Mode 1, Timing Diagram AI06826 Zero Detector Internal Bus Tx Control Rx Control Internal Bus SBUF Write to SBUF Read SBUF Load SBUF SBUF Input Shift Register Shift Serial Port Interrupt Rx Clock Start Tx Clock Start Shift Shift Send Load SBUF TI RI CL DS Q 1FFh TxD Pin Data Rx Detector RxD Pin 1-to-0 Transition Detector ÷16 Sample ÷16 ÷2 TB8 Timer1 Overflow Timer2 Overflow 0 01 1 01 TCLK RCLK SMOD AI06843 Write to SBUF Data Shift TxD TI Rx Clock RxD Bit Detector Sample Times Shift RI Receive Transmit D0 D1 D2 D3 D4 D5 D6 D7 Send Tx Clock Start Bit Stop Bit D0 D1 D2 D3 D4 D5 D6 D7 Start Bit Stop Bit |
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