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EM4150A6WP21 Datasheet(PDF) 11 Page - EM Microelectronic - MARIN SA

Part # EM4150A6WP21
Description  1 KBit READ / WRITE CONTACTLESS IDENTIFICATION DEVICE
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Manufacturer  EMMICRO [EM Microelectronic - MARIN SA]
Direct Link  http://www.emmicroelectronic.com
Logo EMMICRO - EM Microelectronic - MARIN SA

EM4150A6WP21 Datasheet(HTML) 11 Page - EM Microelectronic - MARIN SA

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R
EM4150
EM4350
Communication from the Transceiver to the Transponder (RECEIVE MODE)
(cont.)
While the transceiver is sending data to the transponder, two different modulations will be observed on both coils. During
the first half of the bit period, the EM4150 is switching "ON" its modulation device causing a modulation of the RF field. This
modulation can also be observed on the transceiver's coil. The transceiver sending a bit "0" will switch "OFF" the field,
causing a 100% modulation being observed on the transponder coil.
Transceiver
Coil
Transponder
Coil
"1"
"1"
"1"
"0"
"0"
"0"
16
16
Periods of RF field (Opt 32):
Bit
Period
DATA
:
Modulation induced by the Transceiver
Modulation induced by the Transponder
16
*
* Recommended
Minimum
: 7/4 periods (Opt64/Opt32)
16
Periods of RF field (Opt 64):
32
32
32
32
: 1 period
Fig. 23
Copyright
© 2004, EM Microelectronic-Marin SA
11
www.emmicroelectronic.com


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