DLPS308A June   2025  – October 2025 DLPC6422

PRODUCTION DATA  

  1.   1
  2. 1 Features
  3. 2 Applications
  4. 3 Description
  5. 4 Pin Configuration and Functions
  6. 5 Specifications
    1. 5.1  Absolute Maximum Ratings
    2. 5.2  Recommended Operating Conditions
    3. 5.3  Thermal Information
    4. 5.4  Electrical Characteristics
    5. 5.5  ESD Ratings
    6. 5.6  System Oscillators Timing Requirements
    7. 5.7  Test and Reset Timing Requirements
    8. 5.8  JTAG Interface: I/O Boundary Scan Application Timing Requirements
    9. 5.9  Port 1 Input Pixel Timing Requirements
    10. 5.10 Port 3 Input Pixel Interface (through GPIO) Timing Requirements
    11. 5.11 DMD LVDS Interface Timing Requirements
    12. 5.12 Synchronous Serial Port (SSP) Interface Timing Requirements
    13. 5.13 Programmable Output Clocks Switching Characteristics
    14. 5.14 Synchronous Serial Port Interface (SSP) Switching Characteristics
    15. 5.15 JTAG Interface: I/O Boundary Scan Application Switching Characteristics
  7. 6 Detailed Description
    1. 6.1 Overview
    2. 6.2 Functional Block Diagram
    3. 6.3 Feature Description
      1. 6.3.1 System Reset Operation
        1. 6.3.1.1 Power-Up Reset Operation
        2. 6.3.1.2 System Reset Operation
      2. 6.3.2 Spread Spectrum Clock Generator Support
      3. 6.3.3 GPIO Interface
      4. 6.3.4 Source Input Blanking
      5. 6.3.5 Video Graphics Processing Delay
      6. 6.3.6 Program Memory Flash/SRAM Interface
      7. 6.3.7 Calibration and Debug Support
      8. 6.3.8 Board Level Test Support
    4. 6.4 Device Functional Modes
      1. 6.4.1 Standby Mode
      2. 6.4.2 Active Mode
        1. 6.4.2.1 Normal Configuration
  8. 7 Application and Implementation
    1. 7.1 Application Information
    2. 7.2 Typical Application
      1. 7.2.1 Design Requirements
        1. 7.2.1.1 Recommended MOSC Crystal Oscillator Configuration
      2. 7.2.2 Detailed Design Procedure
    3. 7.3 Power Supply Requirements and Recommendations
      1. 7.3.1 System Power Regulations
      2. 7.3.2 System Power-Up Sequence
      3. 7.3.3 Power-On Sense (POSENSE) Support
      4. 7.3.4 System Environment and Defaults
        1. 7.3.4.1 DLPC6422 System Power-Up and Reset Default Conditions
        2. 7.3.4.2 1.1V 1.15V System Power
        3. 7.3.4.3 1.8V System Power
        4. 7.3.4.4 3.3V System Power
        5. 7.3.4.5 Power Good (PWRGOOD) Support
        6. 7.3.4.6 5V Tolerant Support
    4. 7.4 Layout
      1. 7.4.1 Layout Guidelines
        1. 7.4.1.1 PCB Layout Guidelines for Internal DLPC6422 Power
        2. 7.4.1.2 PCB Layout Guidelines for Auto-Lock Performance
        3. 7.4.1.3 DMD Interface Considerations
        4. 7.4.1.4 Layout Example
        5. 7.4.1.5 Thermal Considerations
  9. 8 Device and Documentation Support
    1. 8.1 Third-Party Products Disclaimer
    2. 8.2 Device Support
      1. 8.2.1 Video Timing Parameter Definitions
      2. 8.2.2 Device Nomenclature
      3. 8.2.3 Device Nomenclature
      4. 8.2.4 Device Markings
        1. 8.2.4.1 Device Marking
    3. 8.3 Documentation Support
      1. 8.3.1 Related Documentation
    4. 8.4 Receiving Notification of Documentation Updates
    5. 8.5 Support Resources
    6. 8.6 Trademarks
    7. 8.7 Electrostatic Discharge Caution
    8. 8.8 Glossary
  10. 9 Revision History
  11. 10Mechanical, Packaging, and Orderable Information

6.3.7 Calibration and Debug Support

The DLPC6422 controller contains a test point output port, TSTPT_(7:0), which provides selected system calibration support as well as ASIC debug support. These test points are inputs while reset is applied and switch to outputs when reset is released. The state of these signals is sampled upon the release of the system reset, and the captured value configures the test mode until the next time a reset is applied. Each test point includes an internal pulldown resistor, and thus, external pullups are used to modify the default test configuration. The default configuration (x00) corresponds to the TSTPT_(7:0) outputs being driven low to reduce switching activity during normal operation. For maximum flexibility, an option to jumper to an external pullup is recommended for TSTPT_(3:0). Note that adding a pullup to TSTPT_(7:4) may have adverse effects for normal operation and is not recommended. Note that these external pullups are only sampled upon a zero-to-one transition on POSENSE and thus changing configuration after reset has been released does not have any effect until the next time reset is asserted and released. Table 6-6 defines the test mode selection for 3 of the 16 programmable scenarios defined by TSTPT_(3:0):

Table 6-6 Test Mode Selection
No Switching ActivitySystem CalibrationARM Debug Signal Set
TSTPT(3:0) Capture Valuex0x8x1
TSTPT(0)0Vertical SyncARM9_Debug (0)
TSTPT(1)0Delayed CW IndexARM9_Debug (1)
TSTPT(2)0Sequence IndexARM9_Debug (2)
TSTPT(3)0CW Spoke Test PtARM9_Debug (3)
TSTPT(4)0CW Revolution Test PtARM9_Debug (4)
TSTPT(5)0Reset Seq. Aux Bit 0ARM9_Debug (5)
TSTPT(6)0Reset Seq. Aux Bit 1ARM9_Debug (6)
TSTPT(7)0Reset Seq. Aux Bit 2ARM9_Debug (7)