Acconeer XM122 Installation manual

IoT module EVK hardware user guide
IoT module EVK hardware user guide
- XM122, XB122, XA122

IoT module EVK hardware user guide
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© 2019 by Acconeer – All rights reserved 2020-06-12
IoT module EVK hardware user guide
- XM122, XB122, XA122
Author: Acconeer
Version 1.3: 2020-06-12
Acconeer AB

IoT module EVK hardware user guide
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2020-06-12 © 2019 by Acconeer – All rights reserved
Table of Contents
1. Overview of the XM122/XB122/XA122 IoT Module Evaluation Kit ............................................ 5
1.1. Introduction ............................................................................................................................. 5
1.2. Getting Started ......................................................................................................................... 6
2. Software for the EVK ...................................................................................................................... 7
2.1. SW download .......................................................................................................................... 7
2.2. SW API Description ................................................................................................................ 7
3. The EVK Hardware ......................................................................................................................... 8
3.1. XB122 Breakout Board ........................................................................................................... 9
3.1.1. Overview ......................................................................................................................... 9
3.1.2. Power ............................................................................................................................. 10
3.1.3. Electrical Schematics..................................................................................................... 11
3.1.4. Bill of Material .............................................................................................................. 14
3.1.5. Component Placement Drawing .................................................................................... 15
3.1.6. Connectors ..................................................................................................................... 16
3.2. XM122 IoT Module .............................................................................................................. 19
3.2.1. Overview ....................................................................................................................... 19
3.2.2. Electrical Schematics..................................................................................................... 20
3.2.3. Bill of Material .............................................................................................................. 24
3.2.4. Component Placement Drawing .................................................................................... 26
3.2.5. Pinning ........................................................................................................................... 27
3.2.6. Using the IoT module without the breakout board ........................................................ 28
3.3. XA122 Battery Board ............................................................................................................ 29
3.3.1. Overview ....................................................................................................................... 29
3.3.2. Electrical Schematics..................................................................................................... 30
3.3.3. Bill of Material .............................................................................................................. 31
3.3.4. Component Placement Drawing .................................................................................... 31
3.3.5. Connectors ..................................................................................................................... 32
3.4. Connectors ............................................................................................................................. 32
3.5. Test Points ............................................................................................................................. 33
4. Safety ............................................................................................................................................. 34
4.1. Electrostatic precautions ........................................................................................................ 34
5. Regulatory Information ................................................................................................................. 35
6. Revision History ............................................................................................................................ 36
7. Disclaimer ..................................................................................................................................... 37

IoT module EVK hardware user guide
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© 2019 by Acconeer – All rights reserved 2020-06-12

IoT module EVK hardware user guide
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2020-06-12 © 2019 by Acconeer – All rights reserved
1. Overview of the XM122/XB122/XA122 IoT Module
Evaluation Kit
1.1. Introduction
The XM122/XB122/XA122 IoT Module Evaluation Kit (The EVK) is a development platform that is
optimized for IoT use cases where low power is important, and the device is expected to run on
battery.
The EVK features Acconeer’s A111 radar sensor. This is an optimized low-power, high-precision 60
GHz radar with antenna in package (AiP) and integrated baseband. Together with the low power
nRF52840 Bluetooth SoC, the XM122 IoT module becomes a powerful radar sensor for IoT
applications.
The A111 is based on pulsed coherent radar technology (PCR). It has leading-edge patented sensor
technology with pico-second time resolution. The A111 sets a new benchmark as far as power
consumption and distance accuracy are concerned and it comes fully integrated in a small package of
29 mm2.
The A111 can measure absolute distance with mm accuracy up to a range of 2 m with a continuous
sweep update frequency of up to 600 Hz. With the use of a dielectric lens the range can be
significantly longer.
The A111, 60 GHz radar is not compromised by natural sources of interference such as noise, dust,
color, direct or indirect light.
The EVK consists of
 1 XM122 IoT Module including an nRF52840
 1 XB122 Breakout board to enable easy flashing and logging.
 1 XA122 Battery board, optional part that can be used for PoC or similar where form factor is
key.

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1.2. Getting Started
A Quick Installation Guide is available at https://www.youtube.com/channel/UC56HMJfKPSpamS-
kMHXOcAw
This short instruction video will ensure a smooth setup and installation. For more information on
retrieving the Acconeer SW, please refer to the next chapter.

IoT module EVK hardware user guide
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2020-06-12 © 2019 by Acconeer – All rights reserved
2. Software for the EVK
2.1. SW download
The SW is available for download at https://developer.acconeer.com both an Software Development
Kit and a Module Server version. SW User Guides can be downloaded at the same location.
2.2. SW API Description
The Acconeer SW comes with an API (Application Programming Interface). Acconeer provides
several service-oriented example and reference applications, as well as customer guidelines for
application development when utilizing the API. All APIs provided by Acconeer are documented.
Unzip the SW zip file downloaded from Acconeer’s download site. In the file structure, please locate
/doc folder from where API documentation in HTML format is found at doc/html/index.html.

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3. The EVK Hardware
VDD (1.8V)
XM122 Board to board connector
SWD
& TRACE
connector
USB Connector
5V
DFU
NRST
NRST
Button
DFU
Button
1.8V
XB122
SWD
connector
VBAT
LDO
GPIO pin
header
USB/UART
converter,
FTDI
FT230XS
USB
VOUT
Selection
switch
Battery Holder
A111
24MHz XTAL
XM122
ENABLE
INTERRUPT
1.8V
DFU
NRST
SPI internal
32MHz XTAL
VIN (1.9-5.5V)
nRF52840
32.768kHz XTAL
2.4GHz antenna
XB122 Board to board connector
Switched
Power
Regulator
Figure 1 The block diagram of the EVK.

IoT module EVK hardware user guide
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3.1. XB122 Breakout Board
3.1.1. Overview
The XB122 is a breakout-board designed for the XM122 IoT Module. It makes the interfaces from the
XM122 module accessible for evaluation and debug. It also enables flashing of the XM122 via USB-
UART or SW-DP. The XM122 is connected to the XB122 via a board-to-board connector on the top
side of the PCB. In Picture 1 you will find the XB122 top side. Picture 2 shows the bottom side of
XB122.
Picture 1
Picture 2

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© 2019 by Acconeer – All rights reserved 2020-06-12
3.1.2. Power
The XB122 is powered via the USB connector. The USB 5V power domain supplies the USB-UART
chip (U1). If the USB-UART interface is not used, a dedicated USB charger can be used.
When the LED D1 on the XB122 is lit, the USB-UART chip is powered and ready to use. If SW1 is
set to “VBUS” it also means that XM122 is powered and ready to use (if connected to the board-to-
board connector on the top side of XB122).
The XM122 can be powered either from the USB 5V power domain or from a CR2477 battery
connected to the battery connector CON1. The CR2477 battery is not included in the EVK. The power
source for XM122 is determined by the setting of the switch “SW1”. The XM122 is powered via the
board-to-board connector J3. If XM122 is powered from the battery, the XB122 can still be powered
from the USB 5V. If one doesn’t want to use the USB-UART interface and XM122 is powered from
the battery, the USB can be left unconnected. For details regarding the power management on XB122,
refer to the XB122 product brief.

IoT module EVK hardware user guide
3.1.3. Electrical Schematics
On the following pages, please find the electrical schematics for the XB122.

IoT module EVK hardware user guide
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© 2019 by Acconeer – All rights reserved 2020-06-12

IoT module EVK hardware user guide
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2020-06-12 © 2019 by Acconeer – All rights reserved

IoT module EVK hardware user guide
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2020-06-12 © 2019 Acconeer – All rights reserved
3.1.4. Bill of Material
Table 1 shows the BOM for the XB122
Table 1 The BOM for the XB122.
Component Ref. Specification QTY Value Comment
B1 MI0805K601R-10/Ferrite
Bead
1 Manufacturer: LAIRD
C1 10/NF/K/16V/X7R/1005 1 10nF
C2,C3 47/PF/J/50V/C0G/1005 2 47pF
C4 4.7/UF/M/10V/X5R/1005 1 4.7uF
C5,C6,C7,C12 100/NF/K/50V/X7R/1005 4 100nF
C9,C15 220/UF/M/6.3V/NP0/3528 2 Manufacturer: AVX
Part number: F930J227MBA
C10,C11,C13,C14 1/UF/K/10V/X5R/1005 4 1uF
CON1 CR2477 battery holder 1 Manufacturer: RTLECS
Part number: CCR2423
D1,D2 631nm LED RED CLEAR
CHIP SMD
2
LTST
-
C193KRKT
-
5A
J1 Micro B USB 2.0 Receptacle 1
Manufacturer: Amphenol
Part number:
10118194_0001LF
J3 DF40C-30DP-0.4V51 1 Manufacturer: Hirose
J4 10 position pin header,
1.27mm
1 Manufacturer: SAMTEC
Part number: FTSH-105-01-
F-DV-P-TR
J5 20 position pin header,
2.54mm
1 Manufacturer: SAMTEC
Part number: TSM-110-01-F-
DV-P-TR
J6 20 position pin header,
1.27mm
1 Manufacturer: SAMTEC
Part number: FTSH-110-01-
F-DV-P-TR
R1 0/OHM/J/1005 1 0 Ohm
R2,R3 27/OHM/F/1005 2 27 Ohm
R4,R7 10/OHM/F/1005 2 10 Ohm
R5,R6,R8,R9 100/KOHM/F/1005 4 100 kOhm
SW1 SPDT Switch 1 Manufacturer: C&K
Part Number:
JS102011JCQN
SW2,SW3 Switch 2 Manufacturer: C&K
Part number: KMR741NG
ULC LFS
U1 FT230XS-R/USB to UART
bridge
1

IoT module EVK hardware user guide
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U2 TPS22916BYFPR 1
U3 SN74LVC1G00DBVR 1
U4 TLV70218DBVT 1
Q1 SSM3J133TU 1
3.1.5. Component Placement Drawing
The component placement drawing of XB122 is found below.
Top Side:
Bottom Side:

IoT module EVK hardware user guide
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© 2019 by Acconeer – All rights reserved 2020-06-12
3.1.6. Connectors
USB (J1)
USB is used as power supply for the XB122 and the XM122 as well as for flashing and
communicating over UART. USB is connected to the FTDI chip FT230XS which converts the UART
interface from XM122 into USB data signals. The pinout of J1 is shown in Table 2.
Table 2. The pinout of J1.
Pin Number
Signal
1 VBUS
2 D-
3 D+
4 ID (GND)
5 GND
30 pin board-to-board connector (J3)
The 30-pin board-to-board connector is intended to connect the XM122 to the XB122. The pinout is
found in Table 3.

IoT module EVK hardware user guide
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Table 3. The pinout of J3.
Pin Number
Signal
Pin Number
Signal
1 GPIO P0.231 2 GND
3 GND 4 VOUT (1.9-5.5V)
5 GPIO P0.211 6 VOUT (1.9-5.5V)
7 GND 8 GND
9 GPIO P0.241 10 GPIO P0.04
11 GND 12 GPIO P0.11/
TRACEDATA2
13 GPIO P0.221 14 GPIO P0.12/
TRACEDATA1
15 GND 16 VDD (Regulated 1.8V
output voltage)
17 GPIO P0.06/
UART_TX
18 nRESET
19 GPIO P0.16/
UART_RX
20 SWDIO
21 GND 22 SWO/ GPIO P1.00/
TRACEDATA0
23 GPIO P0.07/
TRACECLK
24 GND
25 GPIO P1.09/
TRACEDATA3
26 SWDCLK
27 GPIO P0.20/
UART_CTS
28 GND
29 GPIO P0.19/
UART_RTS
30 GPIO P0.25/ DFU
2x5 JTAG/SWD pin header (J4)
The 2x5 JTAG/SWD pin header (1.27mm pitch) contains the signals needed for flashing the XM122
MCU via the SWD interface. The pinout matches that of the Cortex 10-pin JTAG/SWD Connector
and is found in Table 4.
Table 4. The pinout of J4.
Pin Number
Signal
Pin Number
Signal
1 1.8V 2 SWDIO
3 GND 4 SWDCLK
5 GND 6 TRACESWO
7 NC 8 NC
9 GND 10 NRST
1 On XB122, the routing of GPIOs P0.23, P0.21, P0.24 and P0.22 between J3 and J5 has been optimized for SPI
interface configuration.

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2x10 pin header (J5)
The 2x10 pin header (2.54mm pitch) contains miscellaneous GPIOs from the XM122 as well as
VBAT. The pinout is found in Table 5.
Table 5. The pinout of J5.
Pin
Number
Signal
Pin Number
Signal
1 GPIO P0.23 2 GND
3 GND 4 VBAT
5 GPIO P0.21 6 GPIO P0.11/ TRACE2
7 GND 8 GPIO P0.12/ TRACE1
9 GPIO P0.24 10 GPIO P0.19/ UART_RTS
11 GND 12 GPIO P0.20/ UART_CTS
13 GPIO P0.22 14 GPIO P0.25/ DFU
15 GPIO P0.06/
UART_TX
16 GPIO P0.04
17 GPIO P0.16/
UART_
R
X
18 VDD (Regulated 1.8V
output voltage)
19
nRESET
20
GND
Switches and buttons
There is one switch on XB122. SW1 determines if XM122 is powered from the USB 5V power
domain or from a CR2477 coin cell battery. In Table 6 the position of the switch and the
corresponding power source output is shown.
Table 6. The connected terminal of the switch SW1 and corresponding VOUT.
Connected
Terminal
VOUT = 5V VOUT = VBAT
1 TRUE FALSE
2 FALSE TRUE
There are two buttons on the XB122. SW2 controls the signal “DFU” (Device Firmware Upgrade)
connected to XM122 and SW3 controls “NRST” connected to the XM122. In Table 7 the state of the
buttons and the corresponding signal states are listed.
Table 7. The states of the switches SW2 and SW3.
Button
Open (default)
Closed
SW2
DFU=1
DFU=0
SW3
NRST=1
NRST=0

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3.2. XM122 IoT Module
3.2.1. Overview
Picture 3 shows the XM122 IoT Module top side and Picture 4 shows the bottom side.
Picture 3
Picture 4

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3.2.2. Electrical Schematics
Please find the electrical schematics of the XM122 below.