CS5484 datasheet(4/67 Pages) CIRRUS

4 / 67 page

CS5484

DS981F3

LIST OF FIGURES

Figure 1. Oscillator Connections................................................................................................... 7

Figure 2. Multi-device UART Connections.................................................................................... 8

Figure 3. UART Serial Frame Format........................................................................................... 8

Figure 4. Active Energy Load Performance.................................................................................. 9

Figure 5. Reactive Energy Load Performance............................................................................ 10

Figure 6. IRMS Load Performance ............................................................................................. 10

Figure 7. SPI Data and Clock Timing ......................................................................................... 15

Figure 8. Multi-Device UART Timing .......................................................................................... 15

Figure 9. Signal Flow for V1, I1, P1, and Q1 Measurements ..................................................... 17

Figure 10. Signal Flow for V2, I2, P2, and Q2 Measurements ................................................... 17

Figure 11. Low-rate Calculations ................................................................................................18

Figure 12. Power-on Reset Timing ............................................................................................. 21

Figure 13. Zero-crossing Level and Zero-crossing Output on DOx ............................................ 22

Figure 14. Energy Pulse Generation and Digital Output Control ................................................ 23

Figure 15. Sag, Swell, and Overcurrent Detect .......................................................................... 24

Figure 16. Phase Sequence A, B, C for Rising Edge Transition ................................................ 25

Figure 17. Phase Sequence C, B, A for Rising Edge Transition ................................................ 26

Figure 18. Byte Sequence for Page Select................................................................................. 27

Figure 19. Byte Sequence for Register Read ............................................................................ 27

Figure 20. Byte Sequence for Register Write ............................................................................. 27

Figure 21. Byte Sequence for Instructions.................................................................................. 27

Figure 22. Byte Sequence for Checksum ................................................................................... 28

Figure 23. Calibration Data Flow ................................................................................................62

Figure 24. T Register vs. Force Temp ........................................................................................ 65

Figure 25. Typical Connection (Single-phase, 3-wire, 12S Electricity Meter)............................. 66

LIST OF TABLES

Table 1. POR Thresholds . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21

Table 2. Command Format . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27

Table 3. Instruction Format . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28

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