ST PLUG-CR95HF-B User Manual
Daughter board for the CR95HF 13.56 MHz transceiver IC
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!NTENNATUNING
CIRCUIT
30)5!24BUS
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Features
■ Ready-to-use printed circuit board including
– CR95HF multi-protocol transceiver IC
– 47 x 34 mm 13.56 MHz inductive etched
antenna and tuning components
– SPI or UART connector for communication
with the host
Description
The PLUG-CR95HF-B includes a CR95HF
contactless transceiver, a 47 x 34 mm 13.56 MHz
inductive etched antenna and its associated
tuning components.
The user must connect a host to the board
through the UART or the SPI connector. It allows
PLUG-CR95HF-B
Data brief − production data
to control the 13.56 MHz CR95HF multi-protocol
transceiver IC from the host.
The CR95HF acts as a slave. The host can
configure the transceiver and send SPI or UART
commands.
The PLUG-CR95HF-B board is powered through
the VPS pin.
Figure 1. Functional block diagram
March 2012 Doc ID 022387 Rev 2 1/5
This is information on a product in full production. For further information contact your local STMicroelectronics sales
office.
www.st.com
5
Hardware configuration PLUG-CR95HF-B
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33?SOLDERBRIDGE
1 Hardware configuration
The PLUG-CR95HF-B daughter board can use either the UART or the SPI as external serial
interface. SS1_0 solder bridge allows to configure the CR95HF to use either the UART or
the SPI serial interface (see Figure 2, and Ta b le 1 ).
Once the solder bridges are configured, the communication mode is automatically enabled
by the CR95HF at power-on.
Figure 2. Top view of the PLUG-CR95HF-B
Table 1. Solder bridge configuration
Communication mode between CR95HF and host
Solder bridge
UART SPI
SSI1_0 GND VPS
Figure 3. PLUG-CR95HF-B connector
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2/5 Doc ID 022387 Rev 2
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