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ST25R3920B Datasheet(PDF) 41 Page - STMicroelectronics

Part # ST25R3920B
Description  Automotive NFC reader for CCC digital key and car center console
PDF  158 Pages
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Manufacturer  STMICROELECTRONICS [STMicroelectronics]
Direct Link  http://www.st.com
Logo STMICROELECTRONICS - STMicroelectronics

ST25R3920B Datasheet(HTML) 41 Page - STMicroelectronics

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DS13890 Rev 4
41/158
ST25R3920B
Application information
157
Timing related information when using OOK
The following figure represents the interaction between bits and timings during active wave
shaping in OOK modulation.
Figure 10. Bit and timing relation for OOK waveform
MS69283V1
md_res<> (if res_am=1)
d_res<3:0>
modswx<1:0>=11
11: VDD_RF(DR)/AM
Shorted
d_res<3:0>
modulation pulse width
VDD_DR
VDD_AM
VDD_TX
mods
0: Driver to VDD_AM
1: Driver to VDD_DR
am_mod<3:0>=0000
from register
en_tx
sinkx
0: strong sink
1: weak sink
p_len
tmodswx1
tammod1
m
m
tdres1
tentx1
tmods2
modswx2
ov_pattern
tdres2
un_pattern
driver stop



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