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поискавой системы для электроныых деталей |
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поискавой системы для электроныых деталей |
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RM0312 датащи(PDF) 241 Page - STMicroelectronics |
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RM0312 датащи(HTML) 241 Page - STMicroelectronics |
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241 / 275 page  DocID022352 Rev 3 241/275 RM0312 Universal synchronous/asynchronous receiver transmitter (USART) 249 Figure 91. USART data clock timing diagram (M=0) Figure 92. USART data clock timing diagram (M=1) Figure 93. RX data setup/hold time M=0 (8 data bits) Clock (CPOL=0, CPHA=1) Clock (CPOL=1, CPHA=0) Clock (CPOL=1, CPHA=1) Start LSB MSB Stop * LBCL bit controls last data clock pulse Start Idle or preceding transmission Data Stop Clock (CPOL=0, CPHA=0) 01 2 3 4 5 6 7 * * * * Idle or next transmission Idle or next M=1 (9 data bits) Clock (CPOL=0, CPHA=1) Clock (CPOL=1, CPHA=0) Clock (CPOL=1, CPHA=1) Start LSB MSB Stop * LBCL bit controls last data clock pulse Start Idle or preceding transmission Data Stop Clock (CPOL=0, CPHA=0) 01 2 3 4 5 6 7 * * * * 8 transmission valid DATA bit tSETUP tHOLD USART_CK (capture strobe on USART_CK rising edge in this example) Data on USART_RX (from slave) tSETUP = tHOLD 1/16 bit time = 1/16*fUSART_CK |
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