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ST25R3911B Datasheet(PDF) 63 Page - STMicroelectronics

Part # ST25R3911B
Description  High performance HF reader / NFC initiator with 1.4 W supporting VHBR and AAT
PDF  116 Pages
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Manufacturer  STMICROELECTRONICS [STMicroelectronics]
Direct Link  http://www.st.com
Logo STMICROELECTRONICS - STMicroelectronics

ST25R3911B Datasheet(HTML) 63 Page - STMicroelectronics

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1.3.9
Stream mode definition register
Address: 08h
Type: RW
Table 32. Stream mode definition register
Bit Name Default
Function
Comments(1)
7
0
-
-
6
scf1
0
Refer to Table 33
Sub-carrier frequency definition for Sub-carrier and BPSK stream
mode
5
scf0
0
4
scp1
0
scp1 scp0
Number of
pulses
Number of sub-carrier pulses in report period for Sub-carrier and
BPSK stream mode
0
0
1 (BPSK only)
0
1
2
3
scp0
0
1
0
4
1
1
8
2
stx2
0
Refer to Table 34
Definition of time period for Tx modulator control (for Sub-carrier and
BPSK stream mode)
1
stx1
0
0
stx0
1. Default setting takes place at power-up only.
Table 33. Sub-carrier frequency definition for Sub-Carrier and BPSK Stream Mode
scf1
scf0
Sub-Carrier Mode
BPSK Mode
0
0
fc/64 (212 kHz)
fc/16 (848 kHz)
0
1
fc/32 (424 kHz)
fc/8 (1695 kHz)
1
0
fc/16 (848 kHz)
fc/4 (3390 kHz)
1
1
fc/8 (1695 kHz)
Not used
Table 34. Definition of time period for Stream Mode Tx Modulator Control
stx2
stx1
stx0
Time period
0
0
0
fc/128 (106 kHz)
0
0
1
fc/64 (212 kHz)
0
1
0
fc/32 (424 kHz)
0
1
1
fc/16 (848 kHz)
1
0
0
fc/8 (1695 kHz)
1
0
1
fc/4 (3390 kHz)
1
1
0
fc/2 (6780 kHz)
1
1
1
Not used
ST25R3911B
Registers
DS11793 - Rev 6
page 63/116



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