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AN3271 Datasheet(PDF) 4 Page - STMicroelectronics |
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AN3271 Datasheet(HTML) 4 Page - STMicroelectronics |
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4 / 29 page ![]() List of figures AN3271 4/29 Doc ID 17933 Rev 2 List of figures Figure 1. Simplified hookup . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1 Figure 2. Simplified timing sequence for option “enable deasserted after long push” . . . . . . . . . . . . . 5 Figure 3. Simplified timing sequence for option “reset asserted after long push” . . . . . . . . . . . . . . . . 6 Figure 4. Typical application hookup . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8 Figure 5. Simplified relationship among VCCLO, INT and PBOUT . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8 Figure 6. Recommended layout . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9 Figure 7. Push-button noise immunity . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11 Figure 8. Typical connection of PB and SR buttons . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12 Figure 9. Single button control . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12 Figure 10. Alternative single button control . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13 Figure 11. Multiple button control. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14 Figure 12. Adding external logic to implement more inputs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14 Figure 13. Using an LED for low battery voltage detection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15 Figure 14. Automatic confirmation of power-up . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16 Figure 15. Automatic power-up confirmation + shutdown after PB button press or undervoltage . . . . 17 Figure 16. Waveform for shutdown after PB button press . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18 Figure 17. Waveform for shutdown after undervoltage detection . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19 Figure 18. Automatic power-up confirmation + shutdown after PB button press only . . . . . . . . . . . . . 20 Figure 19. VCC transient protection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21 Figure 20. High voltage connection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22 Figure 21. STM660x demonstration board . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25 Figure 22. Block diagram of STM660x demonstration board. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26 Figure 23. STM660x interposer . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26 Figure 24. STM660x demonstration board for evaluation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27 |
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