SNLS499D April   2016  – October 2019 DS90UB914A-Q1

PRODUCTION DATA.  

  1. 1 Features
  2. 2 Applications
  3. 3 Description
    1.     Device Images
      1.      Simplified Schematic
  4. 4 Revision History
  5. 5 Device Comparison Table
  6. 6 Pin Configuration and Functions
    1.     Pin Functions: DS90UB914A-Q1 Deserializer
  7. 7 Specifications
    1. 7.1 Absolute Maximum Ratings
    2. 7.2 ESD Ratings
    3. 7.3 Recommended Operating Conditions
    4. 7.4 Thermal Information
    5. 7.5 Electrical Characteristics
    6. 7.6 AC Timing Specifications (SCL, SDA) - I2C-Compatible
    7. 7.7 Bidirectional Control Bus DC Timing Specifications (SCL, SDA) - I2C-Compatible
    8. 7.8 Deserializer Switching Characteristics
    9. 7.9 Typical Characteristics
  8. 8 Parameter Measurement Information
    1. 8.1 Timing Diagrams and Test Circuits
  9. 9 Detailed Description
    1. 9.1 Overview
    2. 9.2 Functional Block Diagram
    3. 9.3 Feature Description
      1. 9.3.1  Serial Frame Format
      2. 9.3.2  Line Rate Calculations for the DS90UB913A/914A
      3. 9.3.3  Deserializer Multiplexer Input
      4. 9.3.4  Error Detection
      5. 9.3.5  Synchronizing Multiple Cameras
      6. 9.3.6  General-Purpose I/O (GPIO) Descriptions
      7. 9.3.7  LVCMOS VDDIO Option
      8. 9.3.8  EMI Reduction
        1. 9.3.8.1 Deserializer Staggered Output
        2. 9.3.8.2 Spread Spectrum Clock Generation (SSCG) on the Deserializer
      9. 9.3.9  Pixel Clock Edge Select (TRFB / RRFB)
      10. 9.3.10 Power Down
    4. 9.4 Device Functional Modes
      1. 9.4.1 DS90UB913A/914A Operation With External Oscillator as Reference Clock
      2. 9.4.2 DS90UB913A/914A Operation With Pixel Clock From Imager as Reference Clock
      3. 9.4.3 MODE Pin on Deserializer
      4. 9.4.4 Clock-Data Recovery Status Flag (LOCK), Output Enable (OEN) and Output State Select (OSS_SEL)
      5. 9.4.5 Built-In Self Test
      6. 9.4.6 BIST Configuration and Status
      7. 9.4.7 Sample BIST Sequence
    5. 9.5 Programming
      1. 9.5.1 Programmable Controller
      2. 9.5.2 Description of Bidirectional Control Bus and I2C Modes
      3. 9.5.3 I2C Pass-Through
      4. 9.5.4 Slave Clock Stretching
      5. 9.5.5 ID[x] Address Decoder on the Deserializer
      6. 9.5.6 Multiple Device Addressing
    6. 9.6 Register Maps
  10. 10Application and Implementation
    1. 10.1 Application Information
      1. 10.1.1 Power Over Coax
      2. 10.1.2 Power-Up Requirements and PDB Pin
      3. 10.1.3 AC Coupling
      4. 10.1.4 Transmission Media
      5. 10.1.5 Adaptive Equalizer – Loss Compensation
    2. 10.2 Typical Applications
      1. 10.2.1 Coax Application
        1. 10.2.1.1 Design Requirements
        2. 10.2.1.2 Detailed Design Procedure
        3. 10.2.1.3 Application Curves
      2. 10.2.2 STP Application
        1. 10.2.2.1 Design Requirements
        2. 10.2.2.2 Detailed Design Procedure
        3. 10.2.2.3 Application Curves
  11. 11Power Supply Recommendations
  12. 12Layout
    1. 12.1 Layout Guidelines
      1. 12.1.1 Interconnect Guidelines
    2. 12.2 Layout Example
  13. 13Device and Documentation Support
    1. 13.1 Documentation Support
      1. 13.1.1 Related Documentation
    2. 13.2 Receiving Notification of Documentation Updates
    3. 13.3 Community Resources
    4. 13.4 Trademarks
    5. 13.5 Electrostatic Discharge Caution
    6. 13.6 Glossary
  14. 14Mechanical, Packaging, and Orderable Information

Package Options

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

9.4.6 BIST Configuration and Status

The chipset can be programmed into BIST mode using either pins or registers on the DES only. By default, BIST configuration is controlled through pins. BIST can be configured via registers using BIST Control register (0x24). Pin-based configuration is defined as follows:

  • BISTEN = HIGH: Enable the BIST mode, BISTEN = LOW: Disable the BIST mode.
  • Deserializer GPIO0 and GPIO1: Defines the BIST clock source (PCLK vs. various frequencies of internal OSC)

Table 4. BIST Pin Configuration

DESERIALIZER GPIO[0:1] OSCILLATOR SOURCE BIST FREQUENCY
00 External PCLK PCLK or External Oscillator
01 Internal ~50 MHz
10 Internal ~25 MHz

Table 5. BIST Register Configuration

DS90UB914A-Q1
REG 0x24 [2:1]		 10–BIT
MODE		 12–BIT
HIGH-FREQUENCY MODE		 12–BIT
LOW-FREQUENCY MODE
00 PCLK PCLK PCLK
01 100 MHz 75 MHz 50 MHz
10 50 MHz 37.5 MHz 25 MHz
11 Reserved Reserved Reserved

BIST mode provides various options for the PCLK source. Either external pins (GPIO0 and GPIO1) or registers can be used to program the BIST to use external PCLK or various OSC frequencies. Refer to Table 4 for pin settings and refer to Table 7 for register settings. The BIST status can be monitored real-time on the PASS pin. For every frame with error(s), the PASS pin toggles low for one-half of the PCLK period. If two consecutive frames have errors, PASS will toggle twice to allow counting of frames with errors. Once the BIST is done, the PASS pin reflects the pass/fail status of the last BIST run only for one PCLK cycle. The status can also be read through I2C for the number of frames in errors. BIST status register retains results until it is reset by a new BIST session or a device reset. To evaluate BIST in external oscillator mode, both the external oscillator and PCLK need to be present. For all practical purposes, the BIST status can be monitored from the BIST Error Count register 0x25 on the DS90UB914A Deserializer.