Texas Instruments IWR6843L EVM, User Manual, Page: 11 / 16

Table 5-3 shows the J3 and J4 connectors that provide the CAN_L and CAN_H signals from the 2 onboard
CAND-FD transceivers (TCAN1042HGVDRQ1). These signals are wired to the CAN bus after muxing with the
SPI interface signals; one of the two paths must be selected. Two CANs are selected by closing the switch S1.4
(1st position of switch to be ON).
Table 5-3. CAN Pin Assignment
Pin Description Device Interface Connector on Board
SPI_CS1 CAN2_TX J4.1 - CANL, J4.2 - GND, J4.3 - CANH
SPI_CLK1 CAN2_RX
MISO_1 CAN1_TX J3.1 - CANL, J3.2 - GND, J3.3 - CANH
MOSI_1 CAN1_RX
5.8 I2C Connections
The board features an EEPROM, current sensor, and temperature sensor for measuring on-board temperature.
These are connected to the I2C bus and can be isolated using the zero Ω provided on the hardware.
5.9 EEPROM
The board features an EEPROM for storing the board specific IDs (for the identification of the starter kit
connected to the MMWAVEICBOOST).
5.10 Default I2C Address
Table 5-4 provides the list of I2C devices and its address.
Table 5-4. List of I2C Device and Addresses
Sensor Type Designator Part Number Slave Address
Temperature sensor U3 TMP112AQDRLRQ1 100 1011
EEPROM J11 CAT24C08W1-GT3 101 00XX ( 1 )
Current sensor 1 U6 INA226AIDGST 100 0000
Current sensor 2 U7 INA226AIDGST 100 0101
Current sensor 3 U8 INA226AIDGST 100 0001
Current sensor 4 U10 INA226AIDGST 100 0100
PMIC U4 LP87702DRHBRQ1 110 0000
1. XX means 00,01,10,11
5.11 Modular Mode
When used in modular mode as shown in Figure 5-7 , the power is supplied through a single USB connector;
the same USB connector J5 is also used for data transfer through the CP2015 USB to UART converter. When
enumerated correctly, the 2 UART ports are displayed on the device manager as a Virtual COM Port, similar to
that shown in
Figure 5-6 .
Figure 5-6. Virtual COM Port
The SICP2105 drivers must be installed to access the UART port. Download and install the drivers here.
www.ti.com Hardware Details
SWRU585 – NOVEMBER 2021
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