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전자부품 데이터시트 검색엔진 |
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전자부품 데이터시트 검색엔진 |
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ST90R158 데이터시트(PDF) 142 Page - STMicroelectronics |
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ST90R158 데이터시트(HTML) 142 Page - STMicroelectronics |
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142 / 190 page  142/190 ST90158 - SERIAL COMMUNICATIONS INTERFACE (SCI) SERIAL COMMUNICATIONS INTERFACE (Cont’d) 9.5.2 Functional Description The SCI offers four operating modes: – Asynchronous mode – Asynchronous mode with synchronous clock – Serial expansion mode – Synchronous mode Asynchronous mode, Asynchronous mode with synchronous clock and Serial expansion mode output data with the same serial frame format. The differences lie in the data sampling clock rates (1X, 16X) and in the protocol used. Figure 76. SCI Functional Schematic Note: Some pins may not be available on some devices. Refer to the device Pinout Description. Divider by 16 1 0 1 0 Divider by 16 CD CD The control signals marked with (*) are active only in synchronous mode (SMEN=1) Polarity Polarity TXclk / CLKout RX shift register TX buffer register TX shift register RTSEN (*) Enveloper AEN (*) OUTSB (*) Sout AEN RX buffer register Baud rate generator RXclk OCKSB (*) LBEN (*) INTCLK XBRG AEN (*) OCLK XTCLK DCDEN (*) DCD RTS Sin INPL (*) LBEN OUTPL (*) INPE N (*) OCKPL (*) XRX OCLK VR02054 9 |
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