SLVUDM2 October   2025

 

  1.   1
  2.   Description
  3.   Features
  4.   Applications
  5.   5
  6. 1Evaluation Module Overview
    1. 1.1 Introduction
    2. 1.2 Kit Contents
    3. 1.3 Specification
    4. 1.4 Device Information
  7. 2Hardware
    1. 2.1 Quick Setup – Motor Run Mode
    2. 2.2 Quick Setup – OTP Programming Mode
    3. 2.3 Hardware Overview
      1. 2.3.1 Motor PCB connection to MC121EVM
      2. 2.3.2 External Analog Speed Input
      3. 2.3.3 Onboard 12V Boost Circuit
    4. 2.4 MSP430FR2355 Microcontroller
  8. 3Software
    1. 3.1 EVM Firmware
    2. 3.2 GUI Installation
    3. 3.3 Getting Started With Motorstudio for MC121
  9. 4Hardware Design Files
    1. 4.1 Schematics
    2. 4.2 PCB Layouts
    3. 4.3 Bill of Materials (BOM)
  10. 5Additional Information
    1.     Trademarks

2.3.3 Onboard 12V Boost Circuit

An on-board boost circuit is provided for register read and writes only. The boost converter does not support running a motor. Connect the jumper in J16 to enable 12V boost supply output to VM. The boost converts 5V to 12V. The 5V input to the boost converter can be selected between the USB input or an external 5V using the jumper J9. If the external 5V supply is used the supply is connected to J10.

MC121EVM On-board 12V Boost Circuit Schematics Figure 2-9 On-board 12V Boost Circuit Schematics