ZHCSX69E November   2003  – October 2024 LP3943

PRODUCTION DATA  

  1.   1
  2. 1特性
  3. 2应用
  4. 3说明
  5. 4Pin Configuration and Functions
    1.     Pin Functions
  6. 5Specifications
    1. 5.1 Absolute Maximum Ratings
    2. 5.2 ESD Ratings
    3. 5.3 Recommended Operating Conditions
    4. 5.4 Thermal Information
    5. 5.5 Electrical Characteristics
    6. 5.6 I2C Interface (SCL and SDA Pins) Timing Requirements
    7. 5.7 Typical Characteristic
  7. 6Detailed Description
    1. 6.1 Overview
    2. 6.2 Functional Block Diagram
    3. 6.3 Feature Description
    4. 6.4 Device Functional Modes
    5. 6.5 Programming
      1. 6.5.1 I2C Data Validity
      2. 6.5.2 I2C START and STOP Conditions
      3. 6.5.3 Transferring Data
      4. 6.5.4 Auto Increment
    6. 6.6 Register Maps
      1. 6.6.1 Binary Format for Input Registers (Read-only)—Address 0x00 and 0x01
      2. 6.6.2 Binary Format for Frequency Prescaler and PWM Registers — Address 0x02 to 0x05
      3. 6.6.3 Binary Format for Selector Registers — Address 0x06 to 0x09
  8.   Application and Implementation
    1. 7.1 Application Information
    2. 7.2 Typical Application
      1. 7.2.1 Design Requirements
      2. 7.2.2 Detailed Design Procedure
        1. 7.2.2.1 Reducing IQ When LEDs are OFF
      3. 7.2.3 Application Curve
    3. 7.3 System Examples
    4. 7.4 Power Supply Recommendations
    5. 7.5 Layout
      1. 7.5.1 Layout Guidelines
      2. 7.5.2 Layout Example
  9. 7Device and Documentation Support
    1. 7.1 Receiving Notification of Documentation Updates
    2. 7.2 Community Resources
    3. 7.3 Trademarks
  10. 8Revision History
  11.   Mechanical, Packaging, and Orderable Information

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6.4 Device Functional Modes

  1. Output set to high impedance. This is set by programming bits [B0 and B1] to 00 in the LS0, LS1, LS2, or LS3 registers (see Table 2)
  2. Output set to ON state (current switch pulls low). This turns the LED on at the full current in the specified current switch bits [B0 and B1] set to 01 in the LS0, LS1, LS2, or LS3 registers (see Table 6-12).
  3. Output set to toggle at the programmed PWM duty cycle and PWM frequency. This turns on or off the specified current switch at the programmed PWM frequency and duty cycle. Each current switch is mapped to either of the PWM0/PSC0 or PWM1/PSC1 pairs by setting [B0 and B1] to 10 or 11 in the LS0, LS1, LS2, or LS3 registers (see Table 6-12).
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