SLAU834 October   2020 ISO7760 , ISO7762 , MSP432E401Y , TPS92520-Q1 , TPS92682-Q1


  1.   Trademarks
  2. 1Description
    1. 1.1 Typical Applications
    2. 1.2 Connector Description
  3. 2Features and Specifications
  4. 3Schematic, PCB Layout, and Bill of Materials
    1. 3.1 Schematic
    2. 3.2 Layout
    3. 3.3 Bill of Materials
  5. 4Software
    1. 4.1 Demonstration Kit Software Installation for LEDMCUEVM-132 Board
      1. 4.1.1 Installation Overview
    2. 4.2 Step-by-Step Installation Instructions
    3. 4.3 Installation Error Recovery
    4. 4.4 Checking for Updates
  6. 5LEDMCUEVM-132 Power UP and Operation
    1. 5.1 GUI Start-up
    2. 5.2 MCU Control Window
    3. 5.3 SPI Command Window
    4. 5.4 GUI Devices Window and Example Connections and Power Up
      1. 5.4.1 TPS92520EVM-133 Connections and Power UP
      2. 5.4.2 TPS92520EVM-133 Devices Window
      3. 5.4.3 TPS92518EVM-878 Connections and Power Up
      4. 5.4.4 TPS92518EVM-878 Devices Window
      5. 5.4.5 TPS92682EVM-069 + TPS92520EVM-133 Connection and Power UP
      6. 5.4.6 TPS92520, TPS92682 - LPP074 - E1 Devices Window
      7. 5.4.7 TPS92682EVM-069 + TPS92520EVM-133 + TPS92662EVM6-901 Connection and Power UP
      8. 5.4.8 TPS92662EVM6-901 Devices Window

MCU Control Window

The MCU Control window allows external control of the PWM dimming using the LEDMCUEVM-132 connections to the attached EVM. PWM control is available for each channel with frequency and duty cycle control for frequencies and duty cycles that are not covered by the register settings. It also allows for 180 degree phase shift in between channels if desired. For example, if a PWM signal of 3 kHz was desired, they could use this feature.

GUID-770EF0CA-5D3C-4459-BB06-93BDB93C6324-low.gifFigure 5-5 MCU Control (External PWM) Window

PWM 1 is the first PWM generator from the MCU and controls Duty Cycle 1 at PF2 pin of MCU and Duty Cycle 2 at PF3 pin of the MCU. PMW1-DutyCycle 1 coninsides with PWM_1 on the EVM and PWM1-DutyCycle 2 coninsides with PWM_2 of the EVM, see Figure 5-6. Furthermore, The PWM frequency of PMW 1 generator is the same for both PWM_1 and PWM_2 and is seperate from PWM 2 generator, which controls PWM_3 and PWM_4 on the EVM.

GUID-20200930-CA0I-C3K1-XT5L-7XXWXQD4Q1PK-low.gif Figure 5-6 MCU Exnternal PWM for PWM_1 and PWM_2
PWM 2 is the second PWM generator from the MCU and controls Duty Cycle 1 at PG0 pin of the MCU and Duty Cycle 2 at GP1 pin of the MCU. PWM 2 generator signals connects to PWM_3 (PG0) and PWM_4 (PG1) on the attached EVM, see Figure 5-7.

GUID-20200930-CA0I-DPQP-66KM-SJKC9HD94S0D-low.gifFigure 5-7 MCU Exnternal PWM for PWM_3 and PWM_4
Depending on the EVM, the PWM signals will be mapped to PWM_1, 2, 3, 4, or some combination of the four. For example, TPS92520EVM-133 uses PWM_1 and PWM_2 from the PWM 1 genarator of the MCU.