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ST95HF bảng dữ liệu(PDF) 47 Page - STMicroelectronics

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ST95HF bảng dữ liệu(HTML) 47 Page - STMicroelectronics

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ST95HF
Commands
92
Default code per protocol
5.11.2
Improving frame reception for ISO/IEC 14443 Type A tags
To improve ST95HF demodulation when communicating with ISO/IEC 14443 Type A tags, it
is possible to adjust the synchronization between digital and analog inputs by fine-tuning the
Timer Window (TimerW) value. This can be done using the Write Register (WRREG)
command to set a new TimerW value (min. 0x50, max. 0x60). The recommended value is
0x56 or 0x58 when using the ST95HF demo board.
The default value of this parameter (0x52) is set by the PROTOCOLSELECT command, but it can
be overwritten using the WRREG command (0x09).
Table 35. ARC_B default code for available Reader protocols
Communication
protocol
Default
value
Recommended
values for ST95HF
demo board
Possible
Modulation Index
values (MS nibble)
Possible Receiver
Gain values
(LS nibble)
ISO/IEC 14443
Type A reader
0xDF
0xD7
0xD
0x0, 0x1, 0x3, 0x7 or
0xF
ISO/IEC 14443
Type B reader
0x2F
0x37
0x1, 0x2, 0x3 or 0x4
0x0, 0x1, 0x3, 0x7
or 0xF
ISO/IEC 18092
reader
0x5F
0x23
0x1, 0x2, 0x3 or 0x4
0x0, 0x1, 0x3, 0x7
or 0xF
ISO/IEC 15693
reader 30%
0x53
0x53
0x4, 0x5 or 0x6
0x0, 0x1, 0x3, 0x7
or 0xF
ISO/IEC 15693
reader 100%
0xD3
0xD3
0xD
0x0, 0x1, 0x3, 0x7
or 0xF
Table 36. ACC_A default code for available Card Emulation protocols
Communication
protocol
Default
value
Recommended
values for ST95HF
demo board
Possible
Demodulator
Sensitivity values
(MS nibble)
Possible Load
Modulation Index
values (LS nibble)
ISO/IEC 14443
Type A
0x27
0x27
0x2
From 0x1 to 0xF



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