SNLU342 December   2023 MCT8315Z

 

  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 Startup 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 Resistor Settings
      2. 2.7.2 SPI Variant Resistor Settings
  9. 3Software
    1. 3.1 Firmware and GUI Application
    2. 3.2 MCT8315Z 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 MCT8315Z 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.     Trademarks

2.7.2 SPI Variant Resistor Settings

The MCT8315ZR replaces the MODE, ADVANCE, and SLEW pins with SPI pins (SDI, SDO, SCLK, nSCS) to configure control registers and read status registers. When using the MCT8315ZR:

  • SPI enable resistors in the Pop. if SPI silkscreen box needs to be populated (R13-R16)
  • The resistor in the Pop. if HW silkscreen box (R17) needs to be depopulated
  • Resistor dividers in the Hardware Variant Resistors silkscreen box needs to be depopulated (R20-R22, R26-R28).

This setup is shown in Figure 3-8.

GUID-20231201-SS0I-7DVQ-HD3L-8NLVCHPFV1GV-low.png Figure 2-8 Resistors for MCT8315ZR (SPI variant)

Table 3-4 shows the recommended resistor values to use when using a MCT8314ZR.

Table 2-4 Recommended SPI Resistor Values for MCT8314ZR (Defaults in Bold)
Setting Name Description Resistor Configuration
SDO Serial Data Out Serial out of the MCT8315Z R15 R15 = 0 Ω
SDI Serial Data In Serial input of the MCT8315Z R14 R14 = 0 Ω
SCLK Serial Clock Clock generated by the MCU R13 R13 = 0 Ω
nSCS Chip Select Pulled low by the MCU to enable communication R16 R16 = 0 Ω

Table 3-5 show the status of populated and DNP resistors for the MCT8315Z variants.

Table 2-5 Status of Resistors for MCT8315Z Variants
Device R13-R16 Status R17 Status HW Variant Resistors Status
MCT8315ZH or MCT8315ZT DNP Populated User adjustable
MCT8315ZR Populated DNP DNP