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OPTION_REG 数据表(PDF) 177 Page - Microchip Technology |
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OPTION_REG 数据表(HTML) 177 Page - Microchip Technology |
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177 / 222 page  2013 Microchip Technology Inc. DS22331A-page 177 MCP19111 FIGURE 27-26: BUS COLLISION DURING START CONDITION (SCL = 0) FIGURE 27-27: 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 by 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 by software set SSPIF SDAx = 0, SCL = 1, SCLx pulled low after BRG time-out Set SSPIF ’0’ SDA pulled low by other master. Reset BRG and assert SDAx. Set SEN, enable Start sequence if SDA = 1, SCL = 1 |
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