SLIS187C June   2021  – March 2022 TLC6A598

PRODUCTION DATA  

  1. 1 Features
  2. 2 Applications
  3. 3 Description
  4. 4 Revision History
  5. 5 Pin Configuration and Functions
  6. 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 Waveforms
    8. 6.8 Typical Characteristics
  7. 7 Parameter Measurement Information
  8. 8 Detailed Description
    1. 8.1 Overview
    2. 8.2 Functional Block Diagram
    3. 8.3 Feature Description
      1. 8.3.1 Serial-In Interface
      2. 8.3.2 Clear Registers
      3. 8.3.3 Output Channels
      4. 8.3.4 Register Clock
      5. 8.3.5 Cascade Through SER OUT
      6. 8.3.6 Output Control
      7. 8.3.7 Clamping Structure
      8. 8.3.8 Protection Functions
        1. 8.3.8.1 Overcurrent Protection
        2. 8.3.8.2 Output Detection
        3. 8.3.8.3 Serial Communication Error
        4. 8.3.8.4 Thermal Shutdown
      9. 8.3.9 Interface
        1. 8.3.9.1 Register Write
        2. 8.3.9.2 Register Read
        3. 8.3.9.3 Shift-Register Communication-Fault Detection
    4. 8.4 Device Functional Modes
      1. 8.4.1 Operation With VCC < 3 V
      2. 8.4.2 Operation With 5.5 V ≤ VCC ≤ 7 V
    5. 8.5 Register Maps
      1. 8.5.1 Configuration Register(Offset=0h)[reset=0h]
      2. 8.5.2 Fault Readback Register(Offset=1h)[reset=0h]
  9. 9 Application and Implementation
    1. 9.1 Application Information
    2. 9.2 Typical Application 1
      1. 9.2.1 Design Requirements
      2. 9.2.2 Detailed Design Procedure
      3. 9.2.3 Application Curves
    3. 9.3 Typical Application 2
      1. 9.3.1 Design Requirements
      2. 9.3.2 Detailed Design Procedure
    4. 9.4 Typical Application 3
      1. 9.4.1 Design Requirements
      2. 9.4.2 Detailed Design Procedure
  10. 10Power Supply Recommendations
  11. 11Layout
    1. 11.1 Layout Guidelines
    2. 11.2 Layout Example
  12. 12Device and Documentation Support
    1. 12.1 Receiving Notification of Documentation Updates
    2. 12.2 Support Resources
    3. 12.3 Trademarks
    4. 12.4 Electrostatic Discharge Caution
    5. 12.5 Glossary
  13. 13Mechanical, Packaging, and Orderable Information

Package Options

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

8.3.9.3 Shift-Register Communication-Fault Detection

The TLC6A598 device provides a cyclic redundancy check to verify register values in the shift registers. In read back mode, the TLC6A598 device provides 6 bits of the CRC remainder. The MCU can read back the CRC remainder and check if the remainder is correct. The CRC checksum provides a read back method to verify shift register values without altering them.

Figure 8-5 CRC Check Block Diagram

The TLC6A598 device also checks the configuration register for faulty commands. The TLC6A598 configuration register consists of 8 bits. To generate the CRC checksum, the device first shifts left 6 bits and appends 0s, then bit-wise exclusive-ORs the 14 data bits with the polynomial to get the checksum.

For example, if the configuration data is 0xFF and the polynomial is 0x43 (7’b1000011), the CRC checksum is 0x0D (6’b00 1101).

The MCU can read back the CRC checksum and append it to the LSB of 8 bits, and then the 14 bits of data becomes 0x3FCD. Performing the bit-wise exclusive-OR operation with the polynomial must lead to a residual of 0.