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поискавой системы для электроныых деталей |
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поискавой системы для электроныых деталей |
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PIC17C752-08/CL датащи(PDF) 158 Page - Microchip Technology |
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PIC17C752-08/CL датащи(HTML) 158 Page - Microchip Technology |
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158 / 328 page  PIC17C7XX DS30289A-page 158 © 1998 Microchip Technology Inc. FIGURE 15-28: MASTER TRANSMIT FLOWCHART Idle Mode Num_Clocks = 0, Release SDA so slave can drive ACK, Num_Clocks Load BRG with SDA = Current Data bit Yes BRG rollover? No BRG No Yes Force SCL = 0 = 8? Yes No Yes BRG rollover? No Force SCL = 1, Stop BRG SCL = 1? Load BRG with count high time Rollover? No Read SDA and place into ACKSTAT bit (SSPCON2<6>) Force SCL = 0, SCL = 1? SDA = Data bit? No Yes Yes rollover? No Yes Stop BRG, Force SCL = 1 (Clock Arbitration) (Clock Arbitration) Num_Clocks = Num_Clocks + 1 Bus collision detected Set BCLIF, hold prescale off, Yes No BF = 1 Force BF = 0 SSPADD<6:0>, start BRG count, Load BRG with SSPADD<6:0>, start BRG count SSPADD<6:0>, Load BRG with count SCL high time SSPADD<6:0>, SDA = Data bit? Yes No Clear XMIT enable SCL = 0? No Yes Reset BRG Write SSPBUF Set SSPIF |
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