DLPU137 April   2024

 

  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 Specifications
      1. 1.3.1 Electrical Specifications
      2. 1.3.2 Component Temperature Ratings - DLP4620SQ1EVM
      3. 1.3.3 Component Temperature Ratings - DLP4621Q1EVM
      4. 1.3.4 Input Video Specifications
      5. 1.3.5 SPI and I2C Timing
    4. 1.4 Device Information
  7. 2Hardware
    1. 2.1 DLP4620SQ1EVM Block Diagram
    2. 2.2 DLP4621Q1EVM Block Diagram
    3. 2.3 Controller PCB
    4. 2.4 RGB LED Driver PCB - DLP4620SQ1
    5. 2.5 Cables - DLP4620SQ1EVM
    6. 2.6 LED Driver PCB - DLP4621Q1EVM
    7. 2.7 Driver Requirements - DLP4621Q1EVM
    8. 2.8 Cables - DLP4621Q1EVM
    9. 2.9 Optical Engine Requirements
  8. 3Software
    1. 3.1 Software Installation
    2. 3.2 Quick Start - DLP4620SQ1EVM
      1. 3.2.1 Kit Assembly Instructions - DLP4620SQ1EVM
      2. 3.2.2 Powering-Up EVM
      3. 3.2.3 Steps to Reprogram the Onboard Flash Memory
    3. 3.3 Quick Start - DLP4621Q1EVM
      1. 3.3.1 Kit Assembly Instructions - DLP4621Q1EVM
      2. 3.3.2 Powering-Up EVM
      3. 3.3.3 Steps to Reprogram the Onboard Flash Memory
    4. 3.4 Connecting EVM to the DLPC230-Q1 Control Program via SPI
    5. 3.5 Connecting EVM to the DLPC230-Q1 Control Program via USB
  9. 4Hardware Design Files
    1. 4.1 Schematics
    2. 4.2 PCB Layouts
    3. 4.3 Bill of Materials (BOM)
  10. 5Additional Information
    1. 5.1 Trademarks

2.3 Controller PCB

The controller PCB shown in Figure 3-3 includes the DLPC231-Q1 DMD Controller and the TPS99001-Q1. The controller PCB supports video inputs from either a HDMI or OpenLDI interface and provides the formatting and control to display the video on the DLP4620S-Q1 and DLP4621-Q1 DMDs.

The controller board has a SPI port for users who wish to use a Cheetah™ SPI host adapter. However, the Cheetah host adapter must be bought separately from the EVM. This port allows for high-speed SPI communication between the controller board and host. An optional second SPI port is provided for monitoring the TPS990001-Q1 or the TPS99000S-Q1.

The controller board has an additional I2C port. The provided I2C cable includes PROJ_ON, HOLD_BOOT, and HOST_IRQ, signals readily available to allow indirect control and monitoring of the EVM.

If direct SPI or I2C is not preferred, there is an on-board Cypress chip that allows for USB to SPI or USB to I2C communication.

Each of these communication ports allow the user to communicate to the controller from the external world via a PC or the Automotive Control Program reference software, which speeds up the development of supported automotive EVMs. Some features include flashing new firmware onto the controller, changing test pattern generator (TPG) images, changing sources (such as TPG to HDMI), or obtaining controller or PMIC (TPS99000-Q1) diagnostics.

The controller board has an external photodiode input that is used to control white point and brightness over a wide dimming range. An optional second photodiode input is also provided for the DLP4620SQ1EVM kit.

The LED thermistor on the board can be used to measure the temperatures of the red, green, and blue LEDs when using the DLP4620SQ1EVM.

The headlight interface port helps control the LED brightness and PWM output from the controller for the DLP4621Q1EVM.

On the opposite side of the EVM is a HUD interface port, which helps control and monitor an illumination design such as the RGB LED driver provided in the kit. This is used for the DLP4620SQ1EVM.

GUID-66A80F56-640E-441A-A5A9-F0EDD5337212-low.jpg Figure 2-3 DLPC231SQ1EVM Controller PCB

The controller PCB contains the ports listed in Table 3-1. Indicator LEDs are listed in Table 3-2.

Table 2-1 Controller PCB Ports
SCHEMATIC REFERENCE FUNCTION
J1 DMD flex cable interface
J2 Headlight driver interface
J3 LED thermistor
J4 HDMI input
J5 Driver controller power
J6 OpenLDI input
J7 Photodiode 1
J8 Photodiode 2
J9 USB Input
J10 Host 1/2 SPI_CLK select
J11 Host 1/2 SPI_PICO select(1)
J12 Host 1/2 SPI_CSZ select
J13 Host 1/2 SPI_POCI select(1)
J14 Fan PWM output
J15 Host SPI
J16 PMIC SPI
(1) PICO and POCI are used for Peripheral In, Controller Out and Peripheral Out, Controller In, respectively.
Table 2-2 Controller LED Indicators
SCHEMATIC REFERENCE FUNCTION
D2 (Green) PROJ_ON
Off: System Off
On: System On
D3 (Green) Input power to controller (from LED driver)
Off: No power connected
On: Power connected
D4 (Red) HOST_IRQ
Off: Interrupt not asserted
On: Interrupt asserted

The controller PCB switches are listed in Table 3-3. SW4 is a toggle switch for PROJ_ON, which is used to turn on and off the electronics. Note that parts of the board are still powered when PROJ_ON is in the off position. SW1, SW2 and SW3 are dip switches that control the states of configuration signals the DLPC230-Q1 reads when the DLPC230-Q1 comes out of reset. These switches must be set based on the desired configuration options.

Table 2-3 Controller PCB Switches
SCHEMATIC REFERENCE / SIGNAL NUMBER FUNCTION
SW1 CHKSUM_SEL
Off: Disabled
On: Enabled
SW2 HOST_IF_SEL
Off: CRC
On: Checksum
SW3 HOST_SPI_MODE
Off: Host SPI
On: Host I2C
SW4

SPREAD SPECTRUM ENABLE


Off: Mode 0 or 3
On: Mode 1 or 2
SW5

HOLD_BOOTZ


Off: Do not hold in boot (continue to main application)
On: Hold in boot
SW6 PROJ_ON
Off: Turn off system
On: Turn on system