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UPSD3253 Datasheet(PDF) 67 Page - STMicroelectronics |
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UPSD3253 Datasheet(HTML) 67 Page - STMicroelectronics |
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67 / 176 page  67/176 µPSD325X DEVICES Figure 30. Serial Port Mode 1, Waveforms Figure 31. Serial Port Mode 2, Block Diagram AI06843 Write to SBUF Data Shift TxD T1 Rx Clock RxD Bit Detector Sample Times Shift RI S1P1 ÷16 Reset Receive Transmit D0 D1 D2 D3 D4 D5 D6 D7 Send Tx Clock Start Bit Stop Bit TB8 D0 D1 D2 D3 D4 D5 D6 D7 Start Bit Stop Bit RB8 AI06844 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 Data Rx Detector RxD 1-to-0 Transition Detector ÷16 Sample ÷16 ÷2 TB8 Phase2 Clock 1/2*fOSC 01 SMOD |
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