MAX35104 datasheet(4/80 Pages) MAXIM

4 / 80 page

MAX35104

Gas Flow Meter SoC

www.maximintegrated.com

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LIST OF FIGURES

LIST OF TABLES

Figure 1. SPI Timing Diagram Read ...............................................................11

Figure 2. SPI Timing Diagram Write .............................................................. 12

Figure 3. Time-of-Flight Up Measurement Sequence ................................................. 17

Figure 4. Start/Stop for Time-to-Digital Timing ...................................................... 18

Figure 5A. Pulse Echo Measurement Mode ........................................................ 19

Figure 5B. Early Edge Detect Received Wave Example............................................... 20

Figure 6. Boost Circuits Components ............................................................. 21

Figure 7. Kelvin Sense Connection Layout Example.................................................. 22

Figure 8. Piezo Driver Connection................................................................ 24

Figure 9. Analog Front-End ..................................................................... 25

Figure 10. Temperature Command Execution Cycle Example .......................................... 28

Figure 11. EVTMG2 Command .................................................................. 29

Figure 12. EVTMG2 Pseudo Code ............................................................... 29

Figure 13. EVTMG3 Command .................................................................. 31

Figure 14. EVTMG3 Pseudo Code ............................................................... 31

Figure 15. EVTMG1 Pseudo Code ............................................................... 32

Figure 16. EVTMG1 Command .................................................................. 33

Figure 17. Execution Opcode Command Protocol.................................................... 35

Figure 18. Read Register Opcode Command Protocol ................................................ 37

Figure 19. Continuous Read Register Opcode Command Protocol ...................................... 38

Figure 20. Write Register Opcode Command Protocol ................................................ 38

Figure 21. Continuous Write Register Opcode Command Protocol ...................................... 39

Table 1. Two’s Complement TOF_DIFF Conversion Example........................................... 18

Table 2. RSENSE Example Values ............................................................... 22

Table 3. Example Gain Settings.................................................................. 26

Table 4. Randomizer Sampling .................................................................. 27

Table 5. Opcode Commands .................................................................... 35

Table 6. Register Memory Map .................................................................. 40

Table 7. RTC Seconds Register.................................................................. 45

Table 8. RTC Mins_Hrs Register ................................................................. 45

Table 9. RTC Day_Date Register ................................................................ 46

Table 10. RTC Month_Year Register .............................................................. 46

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