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STW8009 Datasheet(PDF) 44 Page - STMicroelectronics |
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STW8009 Datasheet(HTML) 44 Page - STMicroelectronics |
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44 / 55 page  Bus interface STw8009/STw8019 44/55 Figure 14. 2-wire serial MPU control interface format (I2C compatible) / 10-bit addresses Figure 15. 2-wire serial MPU control interface timing 8 LSBs A2 STw8009 register address A * Write operation (10 bits addresses) P STw8009 register data A Can be repeated n times to write in successive registers STw8009 register address A P * Double transaction read Sr r/w A3 STw8009 register data P Read (1) Can be repeated n times to read in successive registers STw8009 register address A3 * Single transaction read STw8009 register data P Can be repeated n times to read in successive registers Sr r/w Read (1) S 11110 r/w A1 Write (0) 2MSBs 8 LSBs A2 S 11110 r/w A1 2MSBs STw8009 slave address Write (0) STw8009 slave address 11110 2MSBs 8 LSBs A2 S 11110 r/w A1 2MSBs Write (0) STw8009 slave address 8 LSBs A2 S 11110 r/w A1 2MSBs Write (0) STw8009 slave address 11110 2MSBs A A/NA A/NA S Start condition P Stop condition A/NA Acknowledge / No Acknoledge From master to slave From slave to master Sr Repeated start condition 8 LSBs A2 STw8009 register address A * Write operation (10 bits addresses) P STw8009 register data A Can be repeated n times to write in successive registers STw8009 register address A P * Double transaction read Sr r/w A3 STw8009 register data P Read (1) Can be repeated n times to read in successive registers STw8009 register address A3 * Single transaction read STw8009 register data P Can be repeated n times to read in successive registers Sr r/w Read (1) S 11110 r/w A1 Write (0) 2MSBs 8 LSBs A2 S 11110 r/w A1 2MSBs STw8009 slave address Write (0) STw8009 slave address 11110 2MSBs 8 LSBs A2 S 11110 r/w A1 2MSBs Write (0) STw8009 slave address 8 LSBs A2 S 11110 r/w A1 2MSBs Write (0) STw8009 slave address 11110 2MSBs A A/NA A/NA S Start condition P Stop condition A/NA Acknowledge / No Acknoledge From master to slave From slave to master Sr Repeated start condition tBUF tHD_STA tLOW tR S=Start P=Stop SCLK SDA tF tHD_DAT tHIGH tSU_DAT tSU_STA tHD_STA Sr=Start repeated tSU_STO P=Stop |
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