DLPS038E July   2014  – August 2019 DLPC3430 , DLPC3435


  1. Features
  2. Applications
  3. Description
    1.     Typical, Simplified System
  4. Revision History
  5. Pin Configuration and Functions
    1.     Pin Functions – Test Pins and General Control
    2.     Pin Functions – Parallel Port Input
    3.     Pin Functions – DSI Input Data and Clock
    4.     Pin Functions – DMD Reset and Bias Control
    5.     Pin Functions – DMD Sub-LVDS Interface
    6.     Pin Functions – Peripheral Interface
    7.     Pin Functions – GPIO Peripheral Interface
    8.     Pin Functions – Clock and PLL Support
    9.     Pin Functions – Power and Ground
  6. Specifications
    1. 6.1  Absolute Maximum Ratings
    2. 6.2  ESD Ratings
    3. 6.3  Recommended Operating Conditions
    4. 6.4  Thermal Information
    5. 6.5  Power Electrical Characteristics
    6. 6.6  Pin Electrical Characteristics
    7. 6.7  Internal Pullup and Pulldown Electrical Characteristics
    8. 6.8  DMD Sub-LVDS Interface Electrical Characteristics
    9. 6.9  DMD Low-Speed Interface Electrical Characteristics
    10. 6.10 System Oscillator Timing Requirements
    11. 6.11 Power Supply and Reset Timing Requirements
    12. 6.12 Parallel Interface Frame Timing Requirements
    13. 6.13 Parallel Interface General Timing Requirements
    14. 6.14 BT656 Interface General Timing Requirements
    15. 6.15 DSI Host Timing Requirements
    16. 6.16 Flash Interface Timing Requirements
    17. 6.17 Other Timing Requirements
    18. 6.18 DMD Sub-LVDS Interface Switching Characteristics
    19. 6.19 DMD Parking Switching Characteristics
    20. 6.20 Chipset Component Usage Specification
  7. Detailed Description
    1. 7.1 Overview
    2. 7.2 Functional Block Diagram
    3. 7.3 Feature Description
      1. 7.3.1 Input Source Requirements
        1. Supported Resolution and Frame Rates
        2. 3D Display
        3. Parallel Interface
          1. PDATA Bus – Parallel Interface Bit Mapping Modes
        4. DSI Interface
      2. 7.3.2 Device Startup
      3. 7.3.3 SPI Flash
        1. SPI Flash Interface
        2. SPI Flash Programming
      4. 7.3.4 I2C Interface
      5. 7.3.5 Content Adaptive Illumination Control (CAIC)
      6. 7.3.6 Local Area Brightness Boost (LABB)
      7. 7.3.7 3D Glasses Operation
      8. 7.3.8 Test Point Support
      9. 7.3.9 DMD Interface
        1. Sub-LVDS (HS) Interface
    4. 7.4 Device Functional Modes
    5. 7.5 Programming
  8. Application and Implementation
    1. 8.1 Application Information
    2. 8.2 Typical Application
      1. 8.2.1 Design Requirements
      2. 8.2.2 Detailed Design Procedure
      3. 8.2.3 Application Curve
  9. Power Supply Recommendations
    1. 9.1 PLL Design Considerations
    2. 9.2 System Power-Up and Power-Down Sequence
    3. 9.3 Power-Up Initialization Sequence
    4. 9.4 DMD Fast Park Control (PARKZ)
    5. 9.5 Hot Plug I/O Usage
  10. 10Layout
    1. 10.1 Layout Guidelines
      1. 10.1.1  PLL Power Layout
      2. 10.1.2  Reference Clock Layout
        1. Recommended Crystal Oscillator Configuration
      3. 10.1.3  DSI Interface Layout
      4. 10.1.4  Unused Pins
      5. 10.1.5  DMD Control and Sub-LVDS Signals
      6. 10.1.6  Layer Changes
      7. 10.1.7  Stubs
      8. 10.1.8  Terminations
      9. 10.1.9  Routing Vias
      10. 10.1.10 Thermal Considerations
    2. 10.2 Layout Example
  11. 11Device and Documentation Support
    1. 11.1 Device Support
      1. 11.1.1 Third-Party Products Disclaimer
      2. 11.1.2 Device Nomenclature
        1. Device Markings
        2. Video Timing Parameter Definitions
    2. 11.2 Documentation Support
      1. 11.2.1 Related Documentation
    3. 11.3 Related Links
    4. 11.4 Receiving Notification of Documentation Updates
    5. 11.5 Community Resources
    6. 11.6 Trademarks
    7. 11.7 Electrostatic Discharge Caution
    8. 11.8 Glossary
  12. 12Mechanical, Packaging, and Orderable Information
    1. 12.1 Package Option Addendum
      1. 12.1.1 Packaging Information

Package Options

Mechanical Data (Package|Pins)
Thermal pad, mechanical data (Package|Pins)

Content Adaptive Illumination Control (CAIC)

Content Adaptive Illumination control (CAIC) is part of the IntelliBright™ suite of advanced image processing algorithms that adaptively enhances brightness and reduces power. In common real-world image content most pixels in the images are well below full scale for the for the R (red), G (green), and B (blue) digital channels input to the DLPC34xx. As a result of this, the average picture level (APL) for the overall image is also well below full scale, and the dynamic range for the collective set of pixel values is not fully used. CAIC takes advantage of the headroom between the source image APL and the top of the available dynamic range of the display system.

CAIC evaluates images on a frame-by-frame basis and derives three unique digital gains, one for each of the R, G, and B color channel. During image processing, CAIC applies each gain to all pixels in the associated color channel. The calculated gain is applied to all pixels in that channel so that the pixels as a group collectively shift upward and as close to full scale as possible. To prevent any image quality degradation, the gains are set at the point where just a few pixels in each color channel are clipped. Figure 20 and Figure 21 show an example of the application of CAIC for one color channel.

DLPC3430 DLPC3435 source_pixels.gif
(1) APL = 110
Figure 20. Source Pixels for a Color Channel
DLPC3430 DLPC3435 display_pixels.gif
(1) APL = 166
(2) Channel gain = 166/110 = 1.51
Figure 21. Pixels for a Color Channel After CAIC Processing

Figure 21 shows the gain that is applied to a color processing channel inside the DLPC34xx. Additionally, CAIC adjusts the power for the R, G, and B LED by commanding different LED currents. For each color channel of an individual frame, CAIC intelligently determines the optimal combination of digital gain and LED power. The user configurable CAIC settings heavily influence the amount of digital gain that is applied to a color channel and the LED power for that color.

DLPC3430 DLPC3435 caic_power_reduction.gif
(1) With CAIC enabled, if red and blue LEDs require less than nominal power for a given input image, the red and blue LED power will reduce.
Figure 22. CAIC Power Reduction Mode (for Constant Brightness)

As CAIC applies a digital gain to each color channel and adjusts the power to each LED, CAIC ensures the resulting color balance in the final image matches the target color balance for the projector system. Thus, the effective displayed white point of images is held constant by CAIC from frame to frame.

CAIC can be used to increase the overall image brightness while holding the total power for all LEDs constant, or CAIC can be used to hold the overall image brightness constant while decreasing LED power. In summary, CAIC has two primary modes of operation:

  • Power reduction mode holds overall image brightness constant while reducing LED power
  • Enhanced brightness mode holds overall LED power constant while enhancing image brightness

In power reduction mode, since the R, G, and B channels can be gained up by CAIC inside the DLPC34xx, the LED power can be reduced for any color channel until the brightness of the color on the screen is unchanged. Thus, CAIC can achieve an overall LED power reduction while maintaining the same overall image brightness as if CAIC was not used. Figure 22 shows an example of LED power reduction by CAIC for an image where the red and blue LEDs can consume less power.

In enhanced brightness mode the R, G, and B channels can be gained up by CAIC with LED power generally being held constant. This results in an enhanced brightness with no power savings.

While there are two primary modes of operation described, the DLPC34xx actually operates within the extremes of pure power reduction mode and enhanced brightness mode. The user can configure which operating mode the DLPC34xx will more closely follow by adjusting the CAIC gain setting as described in the software programmer's guide.