ST25R3911B Datasheet, PDF (82/129 Pages) STMicroelectronics – Automatic antenna tuning system providing tuning of antenna LC tank

ST25R3911B
1.3.8
ISO14443B and FeliCa Settings Register
Address: 07h
Type: RW
Table 29. ISO14443B and FeliCa Settings Register⁽¹⁾
Bit Name Default
Function
Comments
7
tr1_1
6
tr1_0
5
no_sof
4 no_eof
3 eof_12
2
phc_th
1
f_p1
0
f_p0
0
Refer to Table 30
-
0
0 1: No SOF PICC to PCD
According to ISO14443-3 chapter 7.10.3.3
Support of B’
0 1: No EOF PICC to PCD
According to ISO14443-3 chapter 7.10.3.3
0
0: PICC EOF 10 to 11 etu
1: PICC EOF 10 to 12 etu
Support of B⁽²⁾
0
1: Increased tolerance of phase
change detection
-
0 00: 48
01: 64
0 ^{10: 80}
11: 96
FeliCa preamble length (valid also for NFCIP-1
active communication bit rates 242 and 484 kb/s)
1. Default setting takes place at power-up and after Set Default command.
2. Detection of EOF requires larger tolerance range for bit rates with only one sub-carrier frequency period per bit (fc/16 and
higher). Due to this it is not possible to distinguish between EOF with 11 and 12 etu and setting this bit has no impact on
EOF detection.
tr1_1
0
0
1
1
Table 30. Minimum TR1 codings
tr1_0
Minimum TR1 for a PICC to PCD Bit Rate
fc/128
>fc/128
0
80/fs
80/fs
1
64/fs
32/fs
0
Not used
Not used
1
Not used
Not used
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