ST25R3912 datasheet(77/130 Pages) STMICROELECTRONICS

Part #	ST25R3912

Description	High performance HF reader / NFC initiator for payment applications with 1 W output power

PDF	130 Pages

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Manufacturer	STMICROELECTRONICS [STMicroelectronics]

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DS11794 Rev 9

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ST25R3912

111

1.3.8

ISO14443B and FeliCa settings register

Address: 07h

Type: RW

Table 30. ISO14443B and FeliCa settings register(1)

Bit

Name

Default

Function

Comments

7tr1_1

Refer to Table 31

6tr1_0

no_sof

1: No SOF PICC to PCD

According to ISO14443-3 chapter 7.10.3.3

Support of B’

no_eof

1: No EOF PICC to PCD

According to ISO14443-3 chapter 7.10.3.3

3eof_12

0: PICC EOF 10 to 11 etu

1: PICC EOF 10 to 12 etu

Support of B(2)

phc_th

1: Increased tolerance of phase

change detection

f_p1

00: 48

01: 64

10: 80

11: 96

FeliCa preamble length (valid also for NFCIP-1

active communication bit rates 242 and 484 kb/s)

0f_p0

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.

Table 31. Minimum TR1 codings

tr1_1

tr1_0

Minimum TR1 for a PICC to PCD bit rate

fc / 128

>fc / 128

80 / fs

64 / fs

32 / fs

Not used

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