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CR14 Datasheet(PDF) 5 Page - STMicroelectronics |
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CR14 Datasheet(HTML) 5 Page - STMicroelectronics |
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5 / 46 page ![]() CR14 5/46 List of figures Figure 1. Logic Diagram. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7 Figure 2. Logic Block Diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8 Figure 3. SO Pin Connections . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8 Figure 4. CR14 Application Schematic . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10 Figure 5. Maximum RL Value versus Bus Capacitance (CBUS) for an I ²C Bus . . . . . . . . . . . . . . . . . 11 Figure 6. I²C Bus Protocol . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18 Figure 7. CR14 I²C Write Mode Sequence . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19 Figure 8. I²C Polling Flowchart using ACK . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20 Figure 9. CR14 I²C Read Modes Sequences . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21 Figure 10. Host-to-CR14 Transfer: I²C Write to Parameter Register . . . . . . . . . . . . . . . . . . . . . . . . . 22 Figure 11. CR14-to-Host Transfer: I²C Random Address Read from Parameter Register . . . . . . . . . 22 Figure 12. CR14-to-Host Transfer: I²C Current Address Read from Parameter Register . . . . . . . . . . 22 Figure 13. Host-to-CR14 Transfer: I²C Write to Input/Output Frame Register for ISO14443B . . . . . . 23 Figure 14. CR14-to-Host Transfer: I²C Random Address Read from Input/Output Frame Register for ISO14443B . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23 Figure 15. CR14-to-Host Transfer: I²C Current Address Read from I/O Frame Register for ISO14443B . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24 Figure 16. Host-to-CR14 Transfer: I²C Write to Slot Marker Register . . . . . . . . . . . . . . . . . . . . . . . . . 24 Figure 17. CR14-to-Host Transfer: I²C Random Address Read from Slot Marker Register . . . . . . . . 25 Figure 18. CR14-to-Host Transfer: I²C Current Address Read from Slot Marker Register . . . . . . . . . 25 Figure 19. Wave Transmitted using ASK Modulation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26 Figure 20. CR14 Request Frame Character Format . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27 Figure 21. Request Start Of Frame . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27 Figure 22. Request End Of Frame . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28 Figure 23. Wave Received using BPSK Sub-carrier Modulation . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28 Figure 24. Answer Start Of Frame . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29 Figure 25. Answer End Of Frame . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29 Figure 26. Example of a Complete Transmission Frame . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30 Figure 27. CRC Transmission Rules . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30 Figure 28. Standard TAG Command: Request Frame Transmission . . . . . . . . . . . . . . . . . . . . . . . . . 31 Figure 29. Standard TAG Command: Answer Frame Reception. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32 Figure 30. Standard TAG Command: Complete TAG Access Description . . . . . . . . . . . . . . . . . . . . . 32 Figure 31. Anti-Collision ST short range memory Sequence (1) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33 Figure 32. Anti-Collision ST short range memory Sequence Continued . . . . . . . . . . . . . . . . . . . . . . . 34 Figure 33. I²C AC Testing I/O Waveform . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36 Figure 34. I²C AC Waveforms . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 38 Figure 35. CR14 Synchronous Timing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 40 Figure 36. SO16 Narrow - 16 lead Plastic Small Outline, 150 mils body width, Package Outline . . . . 42 |
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