Document Version 1.00
Last revised on
Page 18 of 87
2020-04-10
Reference Manual for uTrust 3720F and uTrust 3721F Readers
4.
uTrust 372x F characteristics
4.1.
uTrust 372x F high level architecture
4.1.1.
Block diagram
The link between uTrust 372x F and the host to which it is connected is the USB interface providing
both the power and the communication channel.
The device controller has several interfaces available. In the uTrust 372x F implementation three
peripherals are connected to the device controller:
●
LED for reader status indication
●
HF AFE to handle communication with HF cards; this peripheral is not present in LF only
variants
●
LF analog circuitry to handle communication with LF cards; this peripheral is not present in
HF only variants
The controller embeds flash memory that contains the firmware developed by Identiv to handle all the
RF communication protocols and the CCID communication protocol with the host. The flash can be
upgraded once the device is deployed in the field, hence enabling firmware upgrades to add and
potentially patch features.
The RF frontend or analog circuitry ensures the coding/decoding/framing modulation/demodulation
required for the RF communication. It is controlled by the device controller through registers.
The matching circuitry provides the transmission and receiver paths adaptation for the antenna to
function properly.
