PCR sensor A121 EVK hardware user guide
Page 12 of 37
2022-07-07
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3.2 XE121 Evaluation Board
3.2.1 Overview
The XE121 Evaluation Board is part of the Acconeer A121 Evaluation Kit and is intended to be used
together with the XC120, a Raspberry Pi or STM Nucleo-64 or STM Nucleo-144 development boards.
XE121 is equipped with 1 fixed A121 pulsed coherent radar sensor as well as 4 FFC (Flat Flexible
Cable) connectors to which XS121 satellite boards can be connected (optional). The flex cable
solution enables a wide variety of use cases involving multiple radar sensors. It also facilitates proof of
concepts since the radar sensor board placement is not limited by the size of the evaluation board. It is
not possible to run the XE121 without one of these “MCU boards” since the XE121 is not equipped
with an MCU for control and communication of the A121 pulsed coherent radar sensor. Figure 3
shows the block diagram of XE121:
Figure 3. The XE121 block diagram.
In the pictures below, the XE121 front and reverse sides are shown as well as how to connect it to
Raspberry Pi and STM Nucleo development boards.