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July 2012 Doc ID 023375 Rev 1 1/3
3
FLEX-M24LR04E
45 mm x 75 mm flexible antenna reference board
for the M24LR04E-R Dual Interface EEPROM
Data brief
Features
■ Ready-to-use flexible printed circuit board
(PCB) inc
luding
– 45 mm x 75 mm 13.56 MHz inductiv
e
ant
enna etched on the PCB
– 100 µm thickness PCB (Kapton)
– M24LR04E-R Dual Interface EEPROM
– Connection for I
2
C bus
– Energy harvesting output (V
OUT
) with a
10
nF capacitance filtering circuit
– RF WIP/BUSY output with 20 kΩ pull-up
resistor, to indicate that an RF operation
is
ong
oing
Description
The FLEX-M24LR04E antenna reference board is
a ready-to-use flexible PCB that features an
M24LR04E Dual Interface EEPROM IC
connected to a 45 mm x 75 mm 13.56 MHz
etched RF antenna on one side, and to an I
2
C bus
on the other side.
The FLEX-M24LR04E antenna allows system
designers to evaluate the M24LR04E
performance and capabilities, and to get started
with their design.
To demonstrate the energy harvesting function,
the FLEX-M24LR04E can be used in conjunction
with ST DEMO-CR95HF-A demonstration board.
The application can be powered directly from the
M24LR04E V
OUT
pin.
The FLEX-M24LR04E Gerber files can be
downloaded from www.st.com.
Figure 1. FLEX-M24LR04E block diagram
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www.st.com
FLEX-M24LR04E
2/3 Doc ID 023375 Rev 1
Associated firmware and PC software
The FLEX-M24LR04E board is supported by a PC software, the Dual Interface EEPROM
tool software, that allows to configure and control the energy harvesting. This software is
available from www.st.com.
Refer to application note AN3954 “Developing your own Visual Basic or C/C++ application
on a DEMO-CR95HF-A demonstration board”, for how to adapt the PC software for your
application.
Revision history
Table 1. Document revision history
Date Revision Changes
2-Jul-2012 1 Initial release.