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A121 EVK – User Guide 
 

11 

 

     Proprietary and Confidential 

2022-07-07                                                                                                      © 2022 by Acconeer – All rights 

reserved

 

 

 

Picture 4. XC120 connected to XE121 and four XS121. 

3.1.2  Power 

The XC120 connector board is powered via USB (5V, 500mA). This 5V power domain powers the 
complete A121 EVK (XC120+XE121+XS121). For some use cases (when attaching more than one 
XS121 board to XE121 and running simultaneous radar measurements on them), more power may be 
needed. An external power supply can then be connected via J3 (not mounted pin header on XC120). 
As soon as 5V is available on J3, the current is automatically drawn from the external power supply. 
When the power LED D1 is lit on XC120, the board is powered on and ready for use. Refer to Picture 
1 for details on J3 and D1 placement. 

 

Summary of Contents for XE121

Page 1: ...PCR sensor A121 EVK hardware user guide XE121 XC120 XS121...

Page 2: ...EVK User Guide 2 Proprietary and Confidential 2022 by Acconeer All rights reserved 2022 07 07 PCR sensor A121 EVK hardware user guide XE121 XC120 XS121 Author Acconeer Version 1 0 2022 07 06 Acconeer...

Page 3: ...1 Overview 8 3 1 2 Power 11 3 2 XE121 Evaluation Board 12 3 2 1 Overview 12 3 2 2 Electrical Schematics 15 3 2 3 Bill of Material 21 3 2 4 Pinning 22 3 3 XS121 Satellite Board 24 3 3 1 Overview 24 3 3...

Page 4: ...Board XS121 Satellite Board The XC120 board carries a cortex M7 MCU which is to be flashed with a software dedicated to stream data from the A121 radar sensor to Acconeer s Exploration Tool via USB H...

Page 5: ...irectly to an STM Nucleo 64 or Nucleo 144 development board featuring the MCU of your choice The main reason for making XE121 compatible with the STM Nucleo development boards is to facilitate SW deve...

Page 6: ...cconeer SW comes with an API Application Programming Interface Acconeer provides several service oriented example applications as well as customer guidelines for application development when utilizing...

Page 7: ...A121 EVK User Guide 7 Proprietary and Confidential 2022 07 07 2022 by Acconeer All rights reserved 3 The EVK Hardware Figure 1 shows the block diagram for the EVK Figure 1 The EVK block diagram...

Page 8: ...ly and after flashing no further configuration by the user is expected The XC120 is delivered with a bootloader so that it can be flashed via the USB interface For details on how to flash the XC120 re...

Page 9: ...A121 EVK User Guide 9 Proprietary and Confidential 2022 07 07 2022 by Acconeer All rights reserved Picture 1 XC120 front side Picture 2 XC120 reverse side...

Page 10: ...idential 2022 by Acconeer All rights reserved 2022 07 07 Picture 3 shows XC120 connected to XE121 and one XS121 Picture 4 shows XC120 connected to XE121 and four XS121 fully loaded configuration Pictu...

Page 11: ...121 XS121 For some use cases when attaching more than one XS121 board to XE121 and running simultaneous radar measurements on them more power may be needed An external power supply can then be connect...

Page 12: ...ellite 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...

Page 13: ...A121 EVK User Guide 13 Proprietary and Confidential 2022 07 07 2022 by Acconeer All rights reserved Picture 5 XE121 front side Picture 6 XE121 reverse side...

Page 14: ...121 EVK User Guide 14 Proprietary and Confidential 2022 by Acconeer All rights reserved 2022 07 07 Picture 7 XE121 connected to Raspberry Pi Picture 8 XE121 connected to an STM Nucleo Development Boar...

Page 15: ...PCR sensor A121 EVK hardware user guide Page 15 of 37 2022 07 07 2018 Acconeer All rights reserved 3 2 2 Electrical Schematics On the following pages please find the schematics for the XE121...

Page 16: ...A121 EVK User Guide 16 Proprietary and Confidential 2022 by Acconeer All rights reserved 2022 07 07...

Page 17: ...A121 EVK User Guide 17 Proprietary and Confidential 2022 07 07 2022 by Acconeer All rights reserved...

Page 18: ...A121 EVK User Guide 18 Proprietary and Confidential 2022 by Acconeer All rights reserved 2022 07 07...

Page 19: ...A121 EVK User Guide 19 Proprietary and Confidential 2022 07 07 2022 by Acconeer All rights reserved...

Page 20: ...A121 EVK User Guide 20 Proprietary and Confidential 2022 by Acconeer All rights reserved 2022 07 07...

Page 21: ...T C193KRKT 5A 1 Vishay Lite on J1 NPTC202KFMS RC 1 Sullins J2 TSM 110 01 S SV 1 Samtec J3 J4 TSM 108 01 S SV 2 Samtec J5 TSM 106 01 S SV 1 Samtec J6 J7 J8 J9 503480 2000 4 Molex L1 LQM2HPN1R0MG0L 1 Mu...

Page 22: ...terrupt signal Pin XC120 J7 XE121 J4 ST Nucleo Description 8 SEN_INT 2 SEN_INT 2 D7 XS121 sensor interrupt signal 7 SEN_INT 3 SEN_INT 3 D6 XS121 sensor interrupt signal 6 SEN_INT 4 SEN_INT 4 D5 XS121...

Page 23: ...sensor enable signal 19 SPI MOSI CON GPIO 10 SPI0 MOSI SPI interface for communication with sensor on XE121 and XS121 20 GND GND 21 SPI MISO CON GPIO 9 SPI0 MISO SPI interface for communication with s...

Page 24: ...but can come in handy when you want to evaluate multi sensor use cases or a use case where space for sensor placement is limited It is not possible to operate the XS121 without an XE121 Evaluation boa...

Page 25: ...A121 EVK User Guide 25 Proprietary and Confidential 2022 07 07 2022 by Acconeer All rights reserved Picture 9 XS121 front side Picture 10 XS121 reverse side...

Page 26: ...VK hardware user guide Page 26 of 37 Proprietary and Confidential 2022 07 07 2018 by Acconeer All rights reserved 3 3 2 Electrical Schematics On the following pages please find the electrical schemati...

Page 27: ...A121 EVK User Guide 27 Proprietary and Confidential 2022 07 07 2022 by Acconeer All rights reserved...

Page 28: ...3 9 NF K 50V X7R 1005 4 3900pF C24 C26 C30 C32 C38 C40 C45 C47 1 UF K 10V X5R 1005 8 1uF L1 MURATA DFE252012R H 1R0M P2 1 1uH J1 J2 J3 J4 Molex 503480 1600 4 16Pin 0 5 FPCB CONN BACKFLIP J5 CNC JINLI...

Page 29: ...ase signal strength by focusing the beam width of the radiated EM waves and thereby concentrating the emitted power The lens kits are sold separately from XE121 and XS121 3 4 2 LH120 Contents and asse...

Page 30: ...the lens is important for optimal performance Both lenses can be fitted in the holder in two different positions D1 or D2 The cover is only used in the D1 position The two positions will give you sli...

Page 31: ...d PCB holder 2 HBL Lens Hyperbolic Lens 3 FZP Lens Fresnel Zone Plate 4 Flat cover Picture 15 shows the LH112 lens holder Picture 15 The LH112 lens and PCB holder The XS121 can be mounted directly to...

Page 32: ...21 mounted in LH112 Both lenses can be fitted in the holder in two different positions D1 or D2 The cover is only used in the D1 position The two positions will give you slightly different performance...

Page 33: ...er All rights reserved 3 5 Design considerations The EVK was designed for sensor evaluation purposes only Should you want to design a product it is strongly recommended to carefully read and follow th...

Page 34: ...2022 by Acconeer All rights reserved 2022 07 07 4 Safety 4 1 Electrostatic precautions Please take electrostatic precautions including using ground straps when using the EVK or any of its components...

Page 35: ...tial 2022 07 07 2022 by Acconeer All rights reserved 5 Regulatory Information Acconeer have no plans to certificate the A121 EVK it is only for evaluation purposes For A121 Certification status refer...

Page 36: ...A121 EVK User Guide 36 Proprietary and Confidential 2022 by Acconeer All rights reserved 2022 07 07 6 Revision History Date Revision Changes 2022 07 06 1 0 Original Version...

Page 37: ...any failure to meet such industry standard requirements Unless explicitly stated herein this document Acconeer has not performed any regulatory conformity test It is the user s responsibility to assu...

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