User manual

SCM3712 REFERENCE MANUAL 20
4. SCM3712 characteristics
4.1. SCM3712 high level architecture
4.1.1. Block diagrams
The link between SCM3712 and the host to which it is connected is the USB interface providing both
the power and the communication channel.
PN 533
Amplifier &
Matching
Network
Connector
LED
Integrated Antenna
Fig.4-1: SCM3712 Reader Board Block Schematic
PN 533
Matching
Network
Connector
LED
Integrated Antenna
Fig.4-2: SCM3712 NFC Reader Board Block Schematic
PN 533
Matching
Network
Connector
LED
External Antenna
50Ω Cable
Fig.4-3: SCM3712 EA Reader Board Block Schematic
SCM3712 is basically designed around an NFC controller which handles the USB communication to
the host and the RF communication. This controller ensures the coding/decoding/framing
modulation/demodulation required for the RF communication.
The matching circuitry provides the transmission and receiver paths adaptation for the antenna to
function properly.