Acconeer XE132 User manual

Entry module EVK hardware user guide
Entry module EVK hardware user guide
- XE132

Entry module EVK hardware user guide
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© 2020 by Acconeer –All rights reserved 2020-09-25
Entry module EVK hardware user guide
- XE132
Author: Acconeer
Version 1.0: 2020-08-31
Acconeer AB

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Table of Contents
1. Overview of the XE132 Entry Module Evaluation Kit .................................................................4
1.1. Introduction.........................................................................................................................4
1.2. Getting Started ....................................................................................................................4
2. Software for the EVK..................................................................................................................5
2.1. SW download......................................................................................................................5
2.2. SW API Description ............................................................................................................5
3. The EVK Hardware.....................................................................................................................6
3.1. XE132 Evaluation Board .....................................................................................................9
3.1.1. Overview .....................................................................................................................9
3.1.2. Power ........................................................................................................................10
3.1.3. Not Mounted Components .........................................................................................10
3.1.4. Electrical Schematics .................................................................................................11
3.1.5. Bill of Material ..........................................................................................................15
3.1.6. Component Placement Drawing .................................................................................16
3.1.7. Connectors.................................................................................................................17
3.2. XM132 Entry Module........................................................................................................19
3.2.1. Overview ...................................................................................................................19
3.2.2. Bill of Material ..........................................................................................................24
3.2.3. Component Placement Drawing .................................................................................24
3.2.4. Land Grid Array Pinning............................................................................................25
4. Safety........................................................................................................................................27
4.1. Electrostatic precautions ....................................................................................................27
5. Regulatory Information .............................................................................................................28
6. Revision History .......................................................................................................................29
7. Disclaimer.................................................................................................................................30

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1. Overview of the XE132 Entry Module Evaluation Kit
1.1. Introduction
The XE132 Entry Module Evaluation Kit (The EVK) is a development platform targeting straight-
forward use cases where small size, low cost and low power is key.
The EVK features Acconeer’s XM132 Entry module, including the A111 radar sensor. The A111
radar sensor is an optimized low-power, high-precision 60 GHz radar with antenna in package (AiP)
and integrated baseband. Together with the ARM® Cortex®-M0+ STM32G0 MCU, the XM132 Entry
module becomes a cost- and size-optimized low-power radar sensor.
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 XE132 Evaluation board with an XM132 Entry module soldered onto it.
1.2. Getting Started
A Quick Installation Guide is available at https://youtu.be/PTcQ0FpRz7E
This short instruction video will ensure a smooth setup and installation. As an alternative you can also
find a guide in pdf-format at https://developer.acconeer.com.

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2. Software for the EVK
2.1. SW download
The SW is available for download at https://developer.acconeer.com. Here you will find both a
Software Development Kit and a Module Server version. SW User Guides can be downloaded at the
same site.
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
In Figure 1 the block-diagram of the XE132 is shown. Figure 2 shows the XM132 block-diagram.

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XM132
USB1 Connector
5V
Boot0
NRST
Button
DFU
Button
XE132
V_EXT (1.8-3.6V)
GPIO pin
header
USB
VIN
0 Ohm
Power pin
header VIN_XM132
USB/UART
converter,
CP2105
SWD
connector
NRST
Selection
switch
LDO
5V to 3.3V
Figure 1 The block-diagram of the XE132.

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24MHz XTAL
XM132
ENABLE
INTERRUPT
BOOT0
NRST
SPI
CTRL
ENABLE
INTERRUPT
CTRL
Power
switch
A111
PS_ENABLE
STM32G071CBU6
Switched
Power
Regulator
LC filter
1V8
Land Grid Array
CPU
(32-bit, 64MHz
Cortex M0+)
Flash
(128kB)
RAM
(36kB)
Levelshifter
VIN to 1V8
Figure 2. The block-diagram of XM132.

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3.1. XE132 Evaluation Board
3.1.1. Overview
The XE132 is an evaluation board including the XM132 Entry module. It makes the interfaces from
the XM132 module accessible for evaluation and debug. It also enables flashing of the XM132 via
USB-UART or SW-DP. The XM132 Entry module is included in the XE132 Evaluation board. In
Picture 1 you will find the XE132 top side where the XM132 is mounted. Picture 2 shows the bottom
side of XE132.
Picture 1. The XE132 top side where XM132 is mounted.
Picture 2. The XE132 bottom side.

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3.1.2. Power
The XE132 is powered via the USB connector J1 and/or via the pin header J3. 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.
The XM132 module mounted on the XE132 can be powered either from a 3.3V LDO (U4) which is
supplied from the USB 5V power domain or from “V_EXT” in the J3 pin header. V_EXT should be
between 1.8V to 3.6V. Typical value of V_EXT is 3.3V.
The power source for XM132 is determined by the setting of the switch “S1”. When the LED D1 on
the XE132 is lit, the XM132 is powered. If power is supplied via V_EXT and the switch S1 is in
position “V_EXT”, both the components on XE132 and XM132 are supplied from the external power
supply.
It should be noted that regardless if “V_EXT” or “3.3V” is used to power XM132, the LED D1 will
consume power since it is connected to “VIN”. If one wants to measure only the current consumed by
XM132, power should be supplied to XM132 via the pin “VIN_XM132” in pin header J3. In this case,
R25 should be unmounted and S1 should be placed in position “3.3V”. This way, all components on
XE132 are supplied from the 3.3V LDO, but XM132 is supplied from the external power supply. D1
will not indicate if XM132 is powered after R25 has been removed.
The intention of the power pin header J3 is that it can be used both for supplying power to XM132 and
for measuring current over a measurement resistor (R25). R25 is a 0 Ohm resistor, but the customer
can change it to a low-value resistor with high accuracy in order to perform very accurate
measurements of the XM132 current. See Table 3 for the pin assignment of pin header J3.
3.1.3. Not Mounted Components
As can be seen in the schematic in chapter 3.1.4, USB connector J2 and several other components are
“No Mount”. These components are related to the FTDI I2C-USB bridge chip FT4222H which can be
mounted on the PCB. It was added for internal Acconeer use, but customers are of course free to
mount these components if they wish. The I2C interface is also accessible in pin header J7. Refer to
Table 5.

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3.1.4. Electrical Schematics
On the following pages, please find the Electrical Schematics for XE132:

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3.1.5. Bill of Material
Table 1 shows the BOM for the XE132
Table 1 The BOM for the XE132.
Component Ref.
Specification
QTY
Value
Comment
C1, C6, C23, C24, C25
Chip Capacitor
0402,X7R,100nF,10%,50V
5
100nF
C2
Chip Capacitors 4.7uF 10V
X5R 0402
1
4.7uF
R6, R24, R25
Chip Resistor,0402,5%,0R
3
0Ohm
C5, C21, C22
Chip Capacitors 0402 X5R
1UF 10% 10V
3
1uF
R1
Chip Resistor
0402,5%,4.7K
1
4.7kOhm
R5
Chip Resistor,0402,5%,47K
1
47kOhm
J4, J5
Tactile switch:
KMR741NG-ULC-LFS
2
Manufacturer: C&K
J1
Micro USB 2.0 B
Receptacle STD
10118194-0001LF
1
Manufacturer: Amphenol
R23
Chip Resistor,0402,5%,33R
1
33Ohm
R2
Chip Resistor,0402,5%,24K
1
24kOhm
U2
TVS Diode 30kV SOT143-4
SP0503BAHTG
1
Manufacturer: Littelfuse Inc.
U1
IC USB-UART Transfer
QFN-24 CP2105-F01-GM
1
Manufacturer: Silicon Labs
U4
IC LDO 3.3 V 100 Ma DBV
TLV70233DBVT
1
Manufacturer: TI
U5
XM132 Entry Radar Sensor
Module
1
Manufacturer: Acconeer AB
U6
IC LDO 1.8V 200mA
TCR2EE17,LM(CT
1
Manufacturer: Toshiba
D1
LED red clear chip smd
LTST-C190CKT
1
Manufacturer: Lite-On Inc
S1
JS102011JCQN, SWITCH
SLIDE SPDT 300MA 6V
1
Manufacturer: C&K
J6
SMD HEADER 2X5 Pitch
1.27MM FTSH-105
1
Manufacturer: Samtec
J3
SMD HEADER 2X2 Pitch
2.54mm TSM-102
1
Manufacturer: Samtec
J7
SMD HEADER 2X10 Pitch
2.54MM TSM-110
1
Manufacturer: Samtec

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3.1.6. Component Placement Drawing
The component placement drawing of XE132 is found below.
Top Side:

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Bottom Side:
3.1.7. Connectors
USB (J1)
USB is used as power supply for the XB132 as well as for flashing and communicating over UART.
USB is connected to the Silicon Labs chip CP2105 which converts the UART interfaces from XM132
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

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Power pin header (J3)
The power pin header J3 provides the possibility to supply the XM132 board with power from an
external power supply. In Table 3, the pin assignment of J3 is shown:
Table 3. The pin assignment of the power pin header J3.
Pin Number
Signal
Pin Number
Signal
1
V_EXT
2
GND
3
VIN
4
VIN_XM132
2x5 JTAG/SWD pin header (J6)
The 2x5 JTAG/SWD pin header (1.27mm pitch) contains the signals needed for flashing the XM132
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 J6.
Pin Number
Signal
Pin Number
Signal
1
VIN_XM132
2
SWD_IO
3
GND
4
SWD_CLK_BOOT0
5
GND
6
NC (no TRACESWO
available)
7
NC
8
NC
9
GND
10
NRESET
2x10 pin header (J7)
The 2x10 pin header (2.54mm pitch) contains miscellaneous GPIOs from the XM132 as well as 1V8
(output from switched power regulator on XM132). The pinout is found in Table 5.
Table 5. The pinout of J7.
Pin Number
Signal
Pin Number
Signal
1
GND
2
SWD_CLK_BOOT0
3
SWD_IO
4
UART_CTS
5
I2C_SCL
6
UART_RTS
7
I2C_SDA
8
WAKE_UP
9
NRESET
10
UART_TX
11
MISC_GPIO2
12
UART_RX
13
MISC_GPIO0
14
MCU_INT
15
DEBUG_UART_RX
16
MISC_GPIO1
17
DEBUG_UART_TX
18
I2C_ADDRESS
19
GND
20
1V8

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Switches and buttons
There is one switch on XE132. S1 determines if XM132 is powered from the 3.3V LDO (U4) on
XE132 or from an external power supply via pin header J3 (V_EXT).
There are two buttons on the XE132. J4, DFU (Device Firmware Upgrade), controls the signal
“BOOT0” on the XM132. Button J5 controls the “NRESET” signal on XM132. In Table 6 the state of
the buttons and the corresponding signal states are listed.
Table 6. The states of the buttons J4 and J5.
Button
Open (default)
Closed
J4
BOOT=0
BOOT0=1
J5
NRESET=1
NRESET=0
3.2. XM132 Entry Module
3.2.1. Overview
The XM132 Entry Module is included in the XE132 design and soldered on the top side of the XE132
via a Land Grid Array pattern on the bottom side of the XM132 PCB. In the schematic below, this
Land Grid Array pattern is called “B2B LGA Connector”. In Picture 3 below the top and bottom side
of XM132 is shown.
Picture 3 The XM132 top side (left) and bottom side (right)

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Electrical Schematics
On the following pages, please find the Electrical Schematics for XM132: