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PIC16F7X7 Datasheet(PDF) 131 Page - Microchip Technology |
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PIC16F7X7 Datasheet(HTML) 131 Page - Microchip Technology |
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131 / 276 page  2004 Microchip Technology Inc. DS30498C-page 129 PIC16F7X7 FIGURE 10-27: BUS COLLISION DURING START CONDITION (SCL = 0) FIGURE 10-28: BRG RESET DUE TO SDA ARBITRATION DURING START CONDITION SDA SCL SEN bus collision occurs. Set BCLIF. SCL = 0 before SDA = 0, Set SEN, enable Start sequence if SDA = 1, SCL = 1 TBRG TBRG SDA = 0, SCL = 1 BCLIF S SSPIF Interrupt cleared in software bus collision occurs. Set BCLIF. SCL = 0 before BRG time-out, ‘0’‘0’ ‘0’ ‘0’ SDA SCL SEN Set S Less than TBRG TBRG SDA = 0, SCL = 1 BCLIF S SSPIF S Interrupts cleared in software set SSPIF SDA = 0, SCL = 1, SCL pulled low after BRG time-out Set SSPIF ‘0’ Set SEN, enable Start sequence if SDA = 1, SCL = 1 SDA pulled low by other master. Reset BRG and assert SDA. |
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