SNLU341A December   2023  – July 2024 MCT8314Z

 

  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 Quick Start Guide
    2. 2.2 Hardware Setup
    3. 2.3 Hardware Connections Overview
    4. 2.4 Connection Details
    5. 2.5 MSP430FR2355 Microcontroller
    6. 2.6 LED Lights
    7. 2.7 User-Configurable Settings
      1. 2.7.1 Hardware Variant Settings
      2. 2.7.2 SPI Variant Resistor Settings
  9. 3Software
    1. 3.1 Firmware and GUI Application
    2. 3.2 MCT8314Z GUI
    3. 3.3 Running the GUI
    4. 3.4 Downloading Code Composer Studio and Importing GUI Firmware
    5. 3.5 Using the eZ-FET to Program the MSP430FR2355
  10. 4Hardware Design Files
    1. 4.1 Schematics
      1. 4.1.1 MCT8314Z 3-Phase Sensored Trapezoidal Motor Driver
      2. 4.1.2 Power Supplies
      3. 4.1.3 MCU Interface
      4. 4.1.4 User Interface
    2. 4.2 PCB Layouts
    3. 4.3 Bill of Materials (BOM)
  11. 5Additional Information
    1. 5.1 Trademarks
  12. 6Revision History

2.5 MSP430FR2355 Microcontroller

The MCT8314ZEVM includes a MSP430FR2355 low-power MCU to provide the pulse-width modulation (PWM) signal required to commutate the motor. The MCU outputs a 20kHz PWM signal (PWM_MSP). The duty cycle (ranging from 0–100%) of the PWM output by the MCU is controlled by the potentiometer R6. The motor speed increases the more the potentiometer is turned counterclockwise, and decreases when turned clockwise. To select whether the PWM signal from the MSP or an external PWM is sourced to the MCT8314Z, use the PWM_SEL jumper J1.

To program the MSP430FR2355, an external MSP430 FET programmer must be connected to the Spy-Bi-Wire (SBW) interface connector J4. Many MSP430 LaunchPads™ provide an on board eZ-FET Debug Probe that can be jumper-wired to the MCT8314ZEVM to flash the firmware into the MSP430FR2355 microcontroller.

The Reset (RST) button at any time to restart the MCU program. Two active-low LEDs, D4 and D5, can be used for debug purposes as well.

The 18-pin shunt jumper bridge J6 ties all signals between the microcontroller and the MCT8314Z device. These jumpers can be inserted or removed as needed to isolate the microcontroller from the gate driver. This allows for microcontroller signal debugging or using the MCT8314ZEVM as a standalone gate driver with an external microcontroller.

MCT8314ZEVM MSP430FR2355 MCU on MCT8314ZEVMFigure 2-5 MSP430FR2355 MCU on MCT8314ZEVM