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

2.7.2 SPI Variant Resistor Settings

The MCT8314ZS replaces the MODE, ADVANCE, and FGOUT/LOCK_DET_TIME pins with SPI pins (SDI, SDO, SCLK, nSCS) to configure control registers and read status registers. When using the MCT8314ZS:

  • SPI enable resistors in the Pop. if SPI silk screen box needs be populated (R10-R13).
  • The resistor in the Pop. if HW silkscreen box (R17) needs be depopulated.
  • Resistor dividers in the Hardware Variant Resistors silk screen box needs be depopulated (R16-R18, R21-R23).

An example of this setup is shown in Figure 3-8.

MCT8314ZEVM Resistors for MCT8314ZS (SPI variant) Figure 2-8 Resistors for MCT8314ZS (SPI variant)

Table 3-4 shows the recommended resistor values to when using a MCT8314ZS. The default resistor configurations are in bold.

Table 2-4 Recommended SPI Resistor Values for MCT8314ZS
SettingNameDescriptionResistorConfiguration
SDOSerial Data OutSerial out of the MCT8314ZR15R15 = 0Ω
SDISerial Data InSerial input of the MCT8314ZR14R14 = 0Ω
SCLKSerial ClockClock generated by the MCUR13R13 = 0Ω
nSCSChip SelectPulled low by the MCU to enable communication

R16

R16 = 0Ω

Table 3-5 show the status of populated and DNP resistors for the MCT834Z variants.

Table 2-5 Status of Resistors for MCT8314Z Variants
DeviceR13-R16 statusR17 statusR16-R18 and R21-R23 status
MCT8314ZHDNPPopulatedUser adjustable
MCT8314ZSPopulatedDNPDNP