SWRU628 January   2025

 

  1.   1
  2.   Description
  3.   Get Started
  4.   Features
  5.   Applications
  6.   6
  7. 1Evaluation Module Overview
    1. 1.1 Introduction
    2. 1.2 Kit Contents
    3. 1.3 Specification
    4. 1.4 Device Information
  8. 2Hardware
    1. 2.1 PCB Storage and Handling Recommendations
    2. 2.2 Antenna
    3. 2.3 Setup
  9. 3Software
    1. 3.1 IWRL6432FSP EVM in TIDA-010254 Reference Design
  10. 4Hardware Design Files
    1. 4.1 Schematics
    2. 4.2 PCB Layouts
    3. 4.3 Bill of Materials (BOM)
  11. 5Additional Information
    1. 5.1 Trademarks
  12. 6References

2.3 Setup

Table 2-1 lists the boot modes and the SOP settings.

Table 2-1 SOP Settings

SOP0

SOP1

Flashing

0

0

Functional

1

0

The SOP mode is changed by grounding the SOP pin to indicate that the SOP mode is OFF or driving the SOP pin with 3.3V to indicate that this is ON. For flashing mode, both SOP0 and SOP1 pins are connected to ground. For functional mode, SOP0 is connected to 3.3V, and SOP1 is connected to ground. The SOP configuration can be seen in the pinout shown in Figure 2-6.

IWRL6432FSPEVM IWRL6432FSP EVM Connector Pinout Figure 2-6 IWRL6432FSP EVM Connector Pinout

For connecting to this EVM from a PC, a USB to UART converter can be used for accessing data and powering the board via USB. This converter is not provided with the kit and can be ordered separately. Ordering details for the USB to UART board can be found in Figure 2-6.

Connect IWRL6432FSP EVM to Breakout Board, USB to UART Adapter, and PC

Connect IWRL6432FSP EVM module to the breakout board provided in the kit.

IWRL6432FSPEVM IWRL6432FSP EVM Connected to Breakout Board Figure 2-7 IWRL6432FSP EVM Connected to Breakout Board

Figure 2-7 includes a dual row, 1.27mm pitch, 24-pin, connector that allows for the EVM to be connected to 2.54mm pitch cables. These pins are used to connect the EVM to the USB to UART adapter board. The top row on the 1.27mm pitch connector corresponds to the top row on the 2.54mm pitch male connector, and the bottom row of the 1.27mm pitch connector corresponds to the bottom row on the 2.54mm pitch male connector.

IWRL6432FSPEVM 1.27mm Pitch Converter Breakout Board Figure 2-8 1.27mm Pitch Converter Breakout Board

This breakout board allows for a connection between the module and USB to UART converter board. The USB to UART converter board uses the FTDI FT232RQ chip to provide an interface for the mmWave Radar board for data to be communicated via UART protocol. This data is transferred by USB interface and interpreted in the GUI. With this data, the GUI then displays a 2D or 3D representation of the objects being detected by the radar.

To use the USB to UART converter, a driver must be installed on the PC that connects to the board. This driver can be downloaded and installed at this link: FTDI Chip. Download and install this driver prior to using the USB to UART converter.

To connect IWRL6432FSP EVM module to the USB to UART converter, make sure the USB to UART adapter is on SYS3V3. This makes sure that the breakout board and module is powered directly by the USB to UART adapter rather than an external power source. This can be done by switching jumper JP1 to SYS (opposite to Figure 2-9).

IWRL6432FSPEVM USB to UART Adapter Voltage Settings Figure 2-9 USB to UART Adapter Voltage Settings

Connect the following pins from the USB to UART adapter to the breakout board.

IWRL6432FSPEVM USB to UART Adapter Connector Figure 2-10 USB to UART Adapter Connector

The pins highlighted in Figure 2-9 and Figure 2-10correspond to the following descriptions (refer to the PmodUSBUART Reference Manual for more information).

Table 2-2 USB to UART Adapter Pinout for EVM Connection
Pin Signal Description
1 RTS Ready to Send
2 RXD Receive
3 TXD Transmit
4 CTS Clear to Send
5 GND Ground
6 SYS3V3 Power Supply (3.3V)

Using Table 2-2 and Figure 2-11, connect the following.

IWRL6432FSPEVM IWRL6432FSPEVM Pinout for USB to UART Adapter Connection Figure 2-11 IWRL6432FSPEVM Pinout for USB to UART Adapter Connection
  1. Connect 3V3 pin on IWRL6432FSP EVM to SYS3V3 power supply on USB to UART.
  2. Connect GND pin on IWRL6432FSP EVM to GND terminal on USB to UART.
  3. Connect UART RX pin on IWRL6432FSP EVM to TXD pin on USB to UART.
  4. Connect UART TX pin on IWRL6432FSP EVM to RXD pin on USB to UART.
  5. Connect SOP1 pin on IWRL6432FSP EVM to GND pin on IWRL6432FSP EVM.
  6. Connect SOP0 pin on IWRL6432FSP EVM to GND for flashing mode, or connect to 3V3 pin on IWRL6432FSP EVM for functional mode.

Once the setup discussed above is complete, connect USB to UART converter to PC via micro USB cable. The setup is shown in Figure 2-12 and Figure 2-13.

IWRL6432FSPEVM IWRL6432FSP EVM Setup (Top View) Figure 2-12 IWRL6432FSP EVM Setup (Top View)
IWRL6432FSPEVM IWRL6432FSP EVM Setup (Bottom View) Figure 2-13 IWRL6432FSP EVM Setup (Bottom View)

Table 2-3 contains the list of LEDs on the IWRL6432FSPEVM.

Table 2-3 LED Settings
LED Reference Designators Description
D3 3.3V power indication
Note: The default setting of the D3 LED is programmed to be OFF, done deliberately for low power consumption.