SLAAEU0 April   2025 MSPM0C1105 , MSPM0C1105 , MSPM0C1106 , MSPM0C1106 , MSPM0H3216 , MSPM0H3216 , MSPM0L1306 , MSPM0L1306

 

  1.   1
  2.   Abstract
  3.   Trademarks
  4. 1Introduction
  5. 2Hardware Connection
  6. 3Software Structure and Important Functions
  7. 4Evaluation Steps
  8. 5Summary
  9. 6References

2 Hardware Connection

Figure 2-1 shows the system block diagram. In the setup, use a power supply, a Li-ion battery, a MSPM0L1306 LaunchPad™ and a BQ2562x EVM. Users can do the setup by following the instructions.

System Block Diagram Figure 2-1 System Block Diagram

A real setup picture is shown in Figure 2-2.

Real Hardware Setup Figure 2-2 Real Hardware Setup

For MSPM0L1306 LaunchPad, PA1 is configured as SCL pin, and PA0 is configured as SDA pin. The MSPM0L1306 is powered using the USB port on the host computer. Table 2-1 shows the signal and power connections between the two EVMs.

Table 2-1 Connection between the EVM and LaunchPad
Connection Type Connection Name

LP-MSPM0L1306 Pin Number

 BQ2562xEVM Pin Number
I2C interface I2C : SCL PA1 J7-3
I2C : SDA PA0 J7-2
Power connections Power : Ground J1-1 J7-1

For the I2C interface, besides the connection of SCL and SDA, there are pull-up designs on both boards. The default hardware setting works well. Users can also select one EVM to pull up the SDA and SCL based on the application.

For the BQ2562x EVM, shorting JP2 and JP3 can pull up the SDA and SCL. The default value of the pull-up resistor is 10k ohm. This needs to be adjusted according the I2C bus speed. Figure 2-3 shows the pull-up jumper diagram on the BQ2562x EVM.

Pull-up in EVM Figure 2-3 Pull-up in EVM

For the LaunchPad, shorting J9-2-3 and J10-2-3 can pull up the SDA and SCL. The default value of the pull-up resistor is 2.2k ohm. This can also be adjusted according the I2C bus speed. Figure 2-4 shows the pull-up jumper diagram on MSPM0L1306 LaunchPad.

Pull-up in LaunchPad Figure 2-4 Pull-up in LaunchPad