SLVSHF3 October   2024 LP5899-Q1

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 Thermal Information
    4. 6.4 Recommended Operating Conditions
    5. 6.5 Electrical Characteristics
    6. 6.6 Timing Requirements
    7. 6.7 Switching Characteristics
    8. 6.8 Timing Diagrams
    9. 6.9 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 Internal Oscillator and Clocks
        1. 7.3.1.1 System Clock
        2. 7.3.1.2 Continuous Clock Serial Interface (CCSI) Clock
      2. 7.3.2 Continuous Clock Serial Interface (CCSI)
        1. 7.3.2.1 Command Format
        2. 7.3.2.2 Command Recognition and Synchronization
        3. 7.3.2.3 CCSI Command Queue
        4. 7.3.2.4 CCSI Start Bit and Check Bits Insertion and Removal
      3. 7.3.3 FIFO
        1. 7.3.3.1 FIFO level and Data Ready (DRDY) Interrupt
        2. 7.3.3.2 FIFO Clearance
      4. 7.3.4 Diagnostics
        1. 7.3.4.1  Undervoltage Lockout
        2. 7.3.4.2  Oscillator Fault Diagnostics
        3. 7.3.4.3  SPI Communications Loss
        4. 7.3.4.4  SPI Communications Error
          1. 7.3.4.4.1 Reset Timer
          2. 7.3.4.4.2 Chip Select (CS) Reset
          3. 7.3.4.4.3 CRC Error
          4. 7.3.4.4.4 Register write failure
        5. 7.3.4.5  CCSI Communications Loss
          1. 7.3.4.5.1 SIN Stuck-at Diagnostics
        6. 7.3.4.6  CCSI Communications Error
          1. 7.3.4.6.1 CHECK Bit Error
          2. 7.3.4.6.2 Data Integrity Diagnostics
          3. 7.3.4.6.3 CCSI Command Queue Overflow
        7. 7.3.4.7  FIFO Diagnostics
          1. 7.3.4.7.1 TXFIFO Overflow
          2. 7.3.4.7.2 TXFIFO Underflow
          3. 7.3.4.7.3 TXFIFO Single Error Detection (SED)
          4. 7.3.4.7.4 RXFIFO Overflow
          5. 7.3.4.7.5 RXFIFO Underflow
          6. 7.3.4.7.6 RXFIFO Single Error Detection (SED)
        8. 7.3.4.8  OTP CRC Error
        9. 7.3.4.9  Fault Masking
        10. 7.3.4.10 Diagnostics Table
    4. 7.4 Device Functional Modes
      1. 7.4.1 Unpowered
      2. 7.4.2 Initialization State
      3. 7.4.3 Normal State
      4. 7.4.4 Failsafe State
    5. 7.5 Programming
      1. 7.5.1 SPI Data Validity
      2. 7.5.2 Chip Select (CS) and SPI Reset Control
      3. 7.5.3 SPI Command Format
      4. 7.5.4 SPI Command Detail
    6. 7.6 Device Registers
  9. 8 Application and Implementation
    1. 8.1 Application Information
    2. 8.2 Typical Application
      1. 8.2.1 Design Requirements
      2. 8.2.2 Detailed Design Procedure
        1. 8.2.2.1 Programming Procedure
      3. 8.2.3 Application Curves
    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 Device Support
    2. 9.2 Documentation Support
      1. 9.2.1 Related Documentation
    3. 9.3 Receiving Notification of Documentation Updates
    4. 9.4 Support Resources
    5. 9.5 Trademarks
    6. 9.6 Electrostatic Discharge Caution
    7. 9.7 Glossary
  11. 10Revision History
  12. 11Mechanical, Packaging, and Orderable Information
    1. 11.1 Tape and Reel Information
    2. 11.2 Mechanical Data

7.3.2.3 CCSI Command Queue

The CCSI controller has the ability to queue multiple SPI commands. This means that when the CCSI controller is still transmitting, a new SPI forward command can be received by the SPI peripheral. This new command is automatically transmitted after the old command is finished transmitting. An example is depicted in Figure 7-3. Note that in this figure every data word is 16 bits. That means that when the width of the block is larger, the clock frequency is lower. In this example the CCSI frequency is lower than the SPI frequency.

LP5899-Q1 Example of queuing CCSI commands Figure 7-3 Example of queuing CCSI commands