DLPU100A May   2020  – April 2024 DLP3021-Q1

 

  1.   1
  2.   Abstract
  3.   Trademarks
  4. 1Introduction
    1. 1.1 Purpose and Scope
  5. 2FPGA Pin Configuration and Functions
    1. 2.1 DMD Interface
    2. 2.2 Light Control
    3. 2.3 Communication
    4. 2.4 Support
    5. 2.5 FPGA Dedicated Pins
    6. 2.6 Power and Ground
    7. 2.7 Unused Pins
  6. 3Specifications
    1. 3.1 Recommended Operating Conditions
    2. 3.2 FPGA Power Consumption
    3. 3.3 Host SPI Interface Timing
    4. 3.4 Power Supply and Reset Timing
      1. 3.4.1 Power-Up Timing
      2. 3.4.2 Power-Down Timing
      3. 3.4.3 Brownout Detection
    5. 3.5 DMD Interface Timing
    6. 3.6 Flash Memory Interface Timing
    7. 3.7 Reference Clock Timing
    8. 3.8 I2C Interface Timing
  7. 4Feature Descriptions
    1. 4.1 Video Control
      1. 4.1.1 Video Options
      2. 4.1.2 Example 1: Display a Static Image
      3. 4.1.3 Example 2: Display 1 Video Repeatedly
      4. 4.1.4 Example 3: Display Two Videos Then Stop
      5. 4.1.5 Example 4: Display a Video Once and Then Display an Image Forever
      6. 4.1.6 Example 5: Display 3+ Videos/Images Seamlessly
    2. 4.2 Temperature Measurements
    3. 4.3 PWM Outputs
    4. 4.4 Host IRQ Interrupt Signal
    5. 4.5 Video and Image Compression
  8. 5Layout
  9. 6Host Command Protocol
    1. 6.1 SPI Specifications
    2. 6.2 SPI Write Command
    3. 6.3 SPI Read Command
  10. 7FPGA Register Definitions
  11. 8Revision History

3.4.3 Brownout Detection

The DLP3021-Q1 FPGA configuration includes a brownout detection function to alert and properly shut down the system when the input voltage begins to fall. FPGA pin F2 is configured as the brownout detect pin. This pin is configured as a digital input that will trigger a brownout interrupt on a high-to-low transition. The input voltage should be divided down as an input to this pin so that the nominal voltage to the pin will not exceed 1.8V. The brownout condition will occur when the input falls below a nominal voltage of 0.9V. Once the brownout condition is triggered and the input voltage remains below the brownout voltage threshold for a 100µs debounce period, the FPGA will automatically begin to park the DMD for proper power-down sequencing. After the brownout detection has parked the DMD, the system must be fully powered down before restarting, ensuring proper power-up sequencing upon restart.

Table 3-6 Brownout Detection Specifications
MIN NOM MAX UNIT
VBrownout Input voltage that triggers the brownout condition 0.8(1) 0.9(1) 1.0(1) V
(1) Voltage valid for VREF = 0.9V.