SNVSD24 August   2025 LP5814I

PRODUCTION DATA  

  1.   1
  2. 1 Features
  3. 2 Applications
  4. 3 Description
  5. 4 Device Comparison
  6. 5 Pin Configuration and Functions
  7. 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 Electrical Characteristics
    6. 6.6 Timing Requirements
    7. 6.7 Timing Diagrams
    8. 6.8 Typical Characteristics
  8. 7 Detailed Description
    1. 7.1 Overview
    2. 7.2 Functional Block Diagram
    3. 7.3 Feature Description
      1. 7.3.1 Analog Dimming
      2. 7.3.2 PWM Dimming
      3. 7.3.3 Sloper
      4. 7.3.4 Autonomous Animation Control
        1. 7.3.4.1 Animation Engine Unit
        2. 7.3.4.2 Animation Pattern Unit
        3. 7.3.4.3 Animation Control
      5. 7.3.5 Instant Blinking
      6. 7.3.6 Protections
        1. 7.3.6.1 UVLO
        2. 7.3.6.2 Thermal Shutdown
    4. 7.4 Device Functional Modes
      1. 7.4.1 Initialization Mode
      2. 7.4.2 Instant Blinking Mode
      3. 7.4.3 Standby and Normal Mode
      4. 7.4.4 Shutdown Mode
      5. 7.4.5 Thermal Shutdown Mode
    5. 7.5 Programming
      1. 7.5.1 I2C Data Tansactions
      2. 7.5.2 I2C Data Format
      3. 7.5.3 Command Description
    6. 7.6 Register Maps
  9. 8 Application and Implementation
    1. 8.1 Application Information
    2. 8.2 Typical Application
      1. 8.2.1 Application
      2. 8.2.2 Design Parameters
      3. 8.2.3 Detailed Design Procedure
        1. 8.2.3.1 Program Procedure
        2. 8.2.3.2 Programming Example
      4. 8.2.4 Application Performance Plots
    3. 8.3 Power Supply Recommendations
    4. 8.4 Layout
      1. 8.4.1 Layout Guidelines
      2. 8.4.2 Layout Example
  10. 9 Device and Documentation Support
    1. 9.1 Documentation Support
    2. 9.2 Receiving Notification of Documentation Updates
    3. 9.3 Support Resources
    4. 9.4 Trademarks
    5. 9.5 Electrostatic Discharge Caution
    6. 9.6 Glossary
  11. 10Revision History
  12. 11Mechanical, Packaging, and Orderable Information
    1. 11.1 Mechanical Data

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7.3.4.3 Animation Control

The LP5814I has individual engine busy flag for each output channel, OUT0_ENGINE_BUSY, OUT1_ENGINE_BUSY, OUT2_ENGINE_BUSY and OUT3_ENGINE_BUSY, to indicate whether the engine selected by the output channel is under running or not. Besides the individule output busy flag there is a global engine busy flag, ENGINE_BUSY, to indicate if there is engine under running or not.

When the ENGINE_BUSY is set as 1, the engine configure registers and pattern configure registers shown in Table 7-4 are locked for modification protection. These engine busy lock registers can only be modified when ENGINE_BUSY = 0.

Table 7-4 Engine Busy Lock Registers
DescriptionRegister AddressRegister Acronym
Engine configure registers0x06 to 0x0CENGINE_CONFIG0 to ENGINE_CONFIG6
Pattern configure registers0x1C to 0x3F
  • PATTERNx_PAUSE_TIME
  • PATTERNx_REPEAT_TIME
  • PATTERNx_PWM0
  • PATTERNx_PWM1
  • PATTERNx_PWM2
  • PATTERNx_PWM3
  • PATTERNx_PWM4
  • PATTERNx_SLOPER_TIME1
  • PATTERNx_SLOPER_TIME2

x = 0, 1, 2, 3

The LP5814I has 4 internal engine busy flags, ENGINE0_BUSY, ENGINE1_BUSY, ENGINE2_BUSY and ENGINE3_BUSY, as shown in Figure 7-7. The ENGINEy_BUSY is set as 1 after Start_command is received with all the below conditions.

  • The engine has been selected by at least one channel, for example OUTx, and there is at least one engine order enabled in this engine
  • The autonomous enable bit is set as 1 of the OUTx

The internal ENGINEy_BUSY flag keeps as 1 until the engine has completed or there is Stop_command received.


LP5814I Internal Engine Busy Status

Figure 7-7 Internal Engine Busy Status

Any one of the internal engine busy flag, ENGINEx_BUSY, set to 1 leads to the global engine busy flag, ENGINE_BUSY, being 1, as shown in Figure 7-8.

The individual engine busy flag, OUTx_ENGINE_BUSY, is dependent on the internal engine busy flag selected by the correpsonding engine channel register value.


LP5814I Individual and Global Engine Busy Flag

Figure 7-8 Individual and Global Engine Busy Flag