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ST95HF Datasheet(PDF) 3 Page - STMicroelectronics

No. de pieza ST95HF
Descripción Electrónicos  Dedicated internal frame controller
Download  93 Pages
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Fabricante Electrónico  STMICROELECTRONICS [STMicroelectronics]
Página de inicio  http://www.st.com
Logo STMICROELECTRONICS - STMicroelectronics

ST95HF Datasheet(HTML) 3 Page - STMicroelectronics

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DocID025630 Rev 4
3/93
ST95HF
Contents
4
5.11
Write Register (WrReg) command (0x09) description . . . . . . . . . . . . . . . 43
5.11.1
Improving RF performance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 43
5.11.2
Improving frame reception for ISO/IEC 14443 Type A tags . . . . . . . . . . 47
5.11.3
Improving RF reception for ISO/IEC 18092 tags . . . . . . . . . . . . . . . . . . 48
5.12
Subcarrier frequency response (0x0B) description . . . . . . . . . . . . . . . . . 48
5.13
AcFilter command (0x0D) description . . . . . . . . . . . . . . . . . . . . . . . . . . . 49
5.14
Echo command (0x55) description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 51
6
Electrical characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 52
6.1
Absolute maximum ratings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 52
6.2
DC characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 53
6.3
Power consumption characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 53
6.4
SPI characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 55
6.5
RF characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 57
6.6
Oscillator characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 59
7
Package information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 60
7.1
VFQFPN32 package information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 60
8
Part numbering . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 63
Appendix A Additional Idle command description . . . . . . . . . . . . . . . . . . . . . . . 64
Appendix B Example of tag detection calibration process . . . . . . . . . . . . . . . . 65
Appendix C Example of tag detection command using
results of tag detection calibration . . . . . . . . . . . . . . . . . . . . . . . . . 68
Appendix D Examples of ST95HF command code to
activate NFC Forum and ISO/IEC 15693 tags . . . . . . . . . . . . . . . . . 69
D.1
ISO/IEC 14443 Type A . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 69
D.1.1
NFC Forum Tag Type 1 (Topaz) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 69
D.1.2
NFC Forum Tag Type 2 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 71
D.1.3
NFC Forum Tag Type 2 or 4: using split frames to resolve collisions . . . 72
D.1.4
NFC Forum Tag Type 2 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 75
D.1.5
NFC Forum Tag Type 4A . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 78
D.2
ISO/IEC 14443 Type B . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 81


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