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AN2269 Datasheet(PDF) 3 Page - STMicroelectronics |
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AN2269 Datasheet(HTML) 3 Page - STMicroelectronics |
3 / 25 page AN2269 - Application Note List of Figures 3/25 List of Figures Figure 1. ST8024 Internal Block Diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1 Figure 2. ST8024 Activation Sequence . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4 Figure 3. Deactivation Sequence . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 Figure 4. CLKDIV Change Clock Duty Cycle . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6 Figure 5. ST8024 Automatic Deactivation Sequence . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8 Figure 6. External Resistor Bridge Applied to PORADJ . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9 Figure 7. VTH(ext) rise (External Rising Threshold Voltage on VDD) . . . . . . . . . . . . . . . . . . . . . . . . . . 10 Figure 8. VTH(ext) fall (External Falling Threshold on VDD) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11 Figure 9. Card Extraction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12 Figure 10. ST8024 Activation Sequence (after tdebounce) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12 Figure 11. ST8024 Current Supply Sequence . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13 Figure 12. ISC Short Circuit Protection. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14 Figure 13. Deactivation Caused By VDDP Drop . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15 Figure 14. ST8024 Application PCB Top Layer . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16 Figure 15. ST8024 Application PCB Bottom Layer . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17 Figure 16. Step-up Converter Block Diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18 Figure 17. ST8024 Application PCB Storage and Pumping Capacitors . . . . . . . . . . . . . . . . . . . . . . . 19 Figure 18. ST8024 Application PCB Crystal (XTAL) Connection. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20 Figure 19. ST8024 Application PCB Smart Card Connections . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21 Figure 20. Ripple on VCC Output Voltage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22 Figure 21. ST8024 Application PCB Schematic . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23 |
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