Texas Instruments IWRL6432BOOST Manuale utente
User’s Guide
IWRL6432BOOST/AWRL6432BOOST EVM: FR4-Based
Low Power 60 GHz mm-Wave Sensor EVM User Guide
Chethan Kumar Y. B.
1 Abstract
The xWRL6432BOOST from Texas Instruments is an easy-to-use low cost FR4-based evaluation board for the
xWRL6432 mmWave sensing device, with standalone operation and direct connectivity to the DCA1000EVM for
raw ADC capture and signal processing development. This EVM contains everything required to start developing
software for on-chip Hardware accelerator and low power ARM Cortex® M4F controllers.
Table of Contents
1 Abstract................................................................................................................................................................................... 1
2 Getting Started........................................................................................................................................................................2
2.1 Key Features......................................................................................................................................................................2
2.2 Kit Contents........................................................................................................................................................................2
2.3 mmWave Out of Box Demo................................................................................................................................................2
3 Hardware................................................................................................................................................................................. 3
3.1 Block Diagram....................................................................................................................................................................5
4 EVM Mux Block Diagram........................................................................................................................................................7
5 PCB Storage and Handling Recommendations:..................................................................................................................8
5.1 PCB Storage and Handling Recommendations:................................................................................................................ 8
5.2 Higher Power Demanding Applications:.............................................................................................................................8
6 XWRL6432BOOST Antenna................................................................................................................................................... 9
6.1 PCB material...................................................................................................................................................................... 9
6.2 Switch Settings.................................................................................................................................................................11
6.3 LEDs................................................................................................................................................................................ 12
6.4 Connectors.......................................................................................................................................................................13
6.5 USB Connector................................................................................................................................................................ 13
6.6 DCA1000 HD Connector..................................................................................................................................................13
6.7 Booster Pack Connector for the LaunchPad Connectivity............................................................................................... 14
6.8 CANFD Connector........................................................................................................................................................... 14
6.9 LIN PHY connection.........................................................................................................................................................16
6.10 I2C Connections.............................................................................................................................................................17
6.11 XDS110 Interface........................................................................................................................................................... 17
6.12 Flashing the Board......................................................................................................................................................... 18
6.13 DCA1000EVM Mode......................................................................................................................................................18
7 Software, Development Tools, and Example Code............................................................................................................22
7.1 XWRL6432 Demo Visualization Getting Started..............................................................................................................22
8 TI E2E Community................................................................................................................................................................ 22
9 References............................................................................................................................................................................ 22
Revision History.......................................................................................................................................................................22
List of Figures
Figure 3-1. XWRL6432BOOST Top View....................................................................................................................................3
Figure 3-2. XWRL6432BOOST Bottom View.............................................................................................................................. 4
Figure 3-3. Salient Features of EVM (Top side)...........................................................................................................................4
Figure 3-4. Salient features of EVM (Bottom side)...................................................................................................................... 5
Figure 3-5. Functional block diagram.......................................................................................................................................... 5
Figure 4-1. Muxing options for the EVM...................................................................................................................................... 7
Figure 6-1. TX and Rx Antennas of the EVM.............................................................................................................................. 9
Figure 6-2. Virtual antenna array............................................................................................................................................... 10
www.ti.com Abstract
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Figure 6-3. Azimuth Antenna Radiation Patterns...................................................................................................................... 10
Figure 6-4. Elevation Antenna Radiation Patterns.....................................................................................................................11
Figure 6-5. S1 Switch for Various Mode Settings.......................................................................................................................11
Figure 6-6. S4 Switch for Various mode Settings...................................................................................................................... 12
Figure 6-7. SOP Switches......................................................................................................................................................... 12
Figure 6-8. USB Connector (J5)................................................................................................................................................ 13
Figure 6-9. DCA1000 HD Connector......................................................................................................................................... 14
Figure 6-10. Booster pack connector.........................................................................................................................................14
Figure 6-11. CANFD Connector.................................................................................................................................................15
Figure 6-12. Analog Mux for the CAN PHY Switch....................................................................................................................15
Figure 6-13. CAN FD PHY used in the EVM............................................................................................................................. 16
Figure 6-14. LIN header and PHY interface.............................................................................................................................. 16
Figure 6-15. LIN PHY interface..................................................................................................................................................16
Figure 6-16. Virtual COM port....................................................................................................................................................17
Figure 6-17. EVM in functional mode using standalone operation............................................................................................ 18
Figure 6-18. DCA1000EVM mode top view...............................................................................................................................19
Figure 6-19. DCA1000EVM mode side view............................................................................................................................. 20
Figure 6-20. DCA1000 CMOS TO LVDS Conversation for Data Lines..................................................................................... 21
Figure 6-21. DCA1000 CMOS TO LVDS Conversation for Clock and Control Lines................................................................ 21
Trademarks
ARM Cortex® is a registered trademark of Arm Cortex.
TI® is a registered trademark of Texas Instruments.
All trademarks are the property of their respective owners.
2 Getting Started
2.1 Key Features
• FR4-based PCB substrate
• Wide field of view antenna, targeted for wall mount applications
• Industrial: Building automation, Presence / motion detection, Displacement sensing, Robotics, Security and
Surveillance, Vital sign detection, Gesture, Factory automation applications
• Automotive: In cabin sensing, Occupancy detection, Child presence detection, Intruder detection, Seat belt
reminder, Gesture applications
• XDS110 JTAG interface with USB connectivity for code development and debugging
• Power optimized discrete DCDC power management solution
• Relaxed PCB rules: lower manufacturing cost
– No micro vias, only through via
– No vias on the BGA pads
• Serial port for onboard QSPI flash programming
• 60-pin, high-density (HD) connectors for raw analog-to-digital converter (ADC) data
• Onboard CAN-FD transceiver
• On board LIN PHY transceiver for automotive variant.
• USB powered standalone mode of operation
• EVM is designed as booster pack to connect with other LaunchPad EVMs
• On board 16Mbit QSPI flash
2.2 Kit Contents
xWRL6432BOOST includes the following:
• XWRL6432BOOST Evaluation board
• Micro USB cable
• Quick Start Guide
2.3 mmWave Out of Box Demo
TI® provides sample demo codes to easily get started with the XWRL6432BOOST evaluation module (EVM)
and to experience the functionality of the XWRL6432 mmWave sensor. For details on getting started with these
demos visit mmWave SDK on ti.com page.
Trademarks www.ti.com
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3 Hardware
Note
The XWRL6432BOOST includes three receivers and two transmitters with a wide field of view sitting on an FR4
PCB substrate.
Figure 3-1. XWRL6432BOOST Top View
www.ti.com Hardware
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Figure 3-4. Salient features of EVM (Bottom side)
3.1 Block Diagram
Figure 3-5. Functional block diagram
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Figure 3-5 shows the functional block diagram. The EVM contains the essential components for the TI mm-
Wave radar system: DCDC, SFLASH, SOP configuration, Filter, TI mmWave Radar chip, a USB to UART
converter, and a 60-pin Samtec connector for interfacing with the DCA1000. The board also hosts a booster
pack connector which can be connected to TI’s LaunchPad boards.
Hardware www.ti.com
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4 EVM Mux Block Diagram
Muxing options for the EVM shows different muxing options for the digital signals. The device is pin limited
to support different features simultaneously; hence various internal IPs and signals are pin multiplexed. EVM
provides de-muxing options using various analog mux and sliding switch options. Figure 4-1 shows different
muxing switch positions to enable different muxing options to connect to different peripherals.
Figure 4-1. Muxing options for the EVM
www.ti.com EVM Mux Block Diagram
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5 PCB Storage and Handling Recommendations:
This EVM contains components that can potentially be damaged by electrostatic discharge. Always transport
and store the EVM in its supplied ESD bag when not in use. Handle using an antistatic wristband and operate on
an antistatic work surface. For more information on proper handling, refer to SSYA010A.
5.1 PCB Storage and Handling Recommendations:
The immersion silver finish of the PCB provides a better high-frequency performance, but is also prone to
oxidation in open environment. This oxidation causes the surface around the antenna region to blacken however
mmWave Radar performance would remain intact. To avoid oxidation, the PCB should be stored in an ESD
cover and kept at a controlled room temperature with low humidity conditions. All ESD precautions must be
taken while using and handling the EVM.
5.2 Higher Power Demanding Applications:
Most of the EVM could be operated with a single USB cable itself. For higher power consumption applications
where a single USB-port cannot supply power needed, use an external 5V / 2A or higher power adaptor.
PCB Storage and Handling Recommendations: www.ti.com
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6 XWRL6432BOOST Antenna
The XWRL6432BOOST includes 3 receivers and 2 transmitters FR4 based antennas on the PCB. Figure 6-1
shows the Antenna configuration.
Figure 6-1. TX and Rx Antennas of the EVM
Note
The XWRL6432BOOST has an antenna gain of ~5-6 dBi across different antenna pairs
6.1 PCB material
Material used for this PCB is FR408HR ½ oz dual ply 2x1067 spread glass construction for the Antenna and
transmission lines and 370HR is used for the rest of the layers.
www.ti.com XWRL6432BOOST Antenna
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6.1.1 Transmitter and receiver virtual array
Transmitter and receiver antennas positions in Figure 6-2 form a virtual array of 6 transmitter and receiver pairs.
This allows object detections finer azimuthal angular resolution (29°) and coarse elevation angular resolution
(58°). Receiver antennas are spaced at distance D (Lambda/2) and Transmitter antenna Tx1 and Tx2 spaced at
2D (lambda) in azimuthal plane and D (Lambda/2) in elevation plane. Tx1 and Tx2 are placed at D (lambda/2) in
the elevation and 2D (Lambda) in azimuth plane.
Figure 6-2. Virtual antenna array
Figure 6-2 shows the antenna radiation pattern with regard to azimuth and Figure 6-3 shows the antenna
radiation pattern with regard to elevation for TX1 and TX2. Both show the radiation pattern for TX1 and TX2 and
RX1, RX2 and RX3 together. All of the measurements were done with a Tx and Rx combination together. Thus,
for the -6dB beam width, you must see a -12db (Tx (-6dB) + Rx(-6dB)) number from the boresight.
Note
Wavelength (Lambda) is computed based on a frequency of 62GHz. Antenna placements are
according to this frequency.
Figure 6-3. Azimuth Antenna Radiation Patterns
Measured azimuthal radiation pattern for all Tx to Rx pairs (Corner reflector placed at ~5 meters with a 4- GHz
bandwidth chirp starting at 59GHz)
XWRL6432BOOST Antenna www.ti.com
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