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ST25R3910 Datasheet(PDF) 43 Page - STMicroelectronics

Part # ST25R3910
Description  AM/PM demodulator
PDF  65 Pages
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Manufacturer  STMICROELECTRONICS [STMicroelectronics]
Direct Link  http://www.st.com
Logo STMICROELECTRONICS - STMicroelectronics

ST25R3910 Datasheet(HTML) 43 Page - STMicroelectronics

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ST25R3910
55
1.3.7
Receiver Configuration Register
Address: 06h
Type: RW
Table 14. Receiver Configuration Register(1)
Bit
Name
Default
Function
Comments
7
agc_en
0
1: AGC enabled
AGC operation mode
6
agc_m
0
1: AGC operates on first eight subcarrier pulses
0: AGC operates during the whole receive period
5rg2
0
rg2
rg1
rg0
Gain reduction
Gain reduction from 0 to 21 db,
in 3 db steps
4
rg1
0
000
0
3rg0
0
0
0
1
3 db
1
1
1
21 db
2
fs2
0
fs2
fs1
fs0
Filter
selection(2)
Comments
Filter selection is automatically set
when ISO mode or receive data rate
changes (change of ISO Mode
Definition Register). After automatic
preset filter, selection can be changed
by writing these bits.
1
fs1
0
000
ISO-14443A
106 kbps
Automatic
preset
0
fs0
0
001
ISO-14443B
106 kbps
010
ISO-14443A/B
212 kbps
011
ISO-14443A/B
424 kbps
100
ISO-14443A/B
848 kbps
110
424/848 kHz
subcarriers
No automatic
preset
111
212 kHz
subcarrier
Other combinations not supported, or used for
block testing purposes
1. Default setting takes place at power-up and after Set Default command.
2. Filter selection bits are preset also when ISO mode or receive data rate change.



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