SWRS350B December   2025  – September 2026 IWRL6432WMOD

PRODUCTION DATA  

  1.   1
  2. 1 Features
  3. 2 Applications
  4. 3 Description
  5. 4 Terminal Configurations and Functions
    1. 4.1 Pin Diagrams
    2. 4.2 Signal Descriptions
  6. 5 Specifications
    1. 5.1  Absolute Maximum Ratings
    2. 5.2  ESD Ratings
    3. 5.3  Recommended Operating Conditions
    4. 5.4  Module Power Management
    5. 5.5  Typical Power Consumption Numbers
    6. 5.6  Peak Current Requirement per Voltage Rail
    7. 5.7  RF Specification
    8. 5.8  Antenna Position
      1. 5.8.1 2D Antenna Array With 3D Detection Capability
    9. 5.9  Antenna Gain Plot
      1. 5.9.1 Measured Azimuth Loopback Plot
      2. 5.9.2 Measured Elevation Loopback Plot
    10. 5.10 Thermal Resistance Characteristics
    11. 5.11 Timing and Switching Characteristics
      1. 5.11.1 Power Supply Sequencing and Reset Timing
      2. 5.11.2 MultiChannel buffered / Standard Serial Peripheral Interface (McSPI)
        1. 5.11.2.1 SPI Timing Conditions
        2. 5.11.2.2 SPI—Peripheral Mode
          1. 5.11.2.2.1 Timing and Switching Requirements for SPI - Peripheral Mode
          2. 5.11.2.2.2 Timing and Switching Characteristics for SPI Output Timings—Secondary Mode
        3. 5.11.2.3 SPI Protocol
          1. 5.11.2.3.1 Data Format for Host Communication over SPI
          2. 5.11.2.3.2 Typical Sequence Diagram
      3. 5.11.3 Dedicated Input/Output
        1. 5.11.3.1 Switching Characteristics for Output Timing versus Load Capacitance (CL)
      4. 5.11.4 Serial Communication Interface (SCI)
        1. 5.11.4.1 SCI Timing Requirements
  7. 6 Detailed Description
    1. 6.1 Overview
      1. 6.1.1 Module Images
    2. 6.2 Functional Block Diagram
    3. 6.3 Subsystems
      1. 6.3.1 Host Interface
        1. 6.3.1.1 Interface Signal Description
        2. 6.3.1.2 Operating Modes
      2. 6.3.2 Device Firmware
  8. 7 Device Certification
    1. 7.1 FCC Certification and Statement
    2. 7.2 ETSI/CE
    3. 7.3 End Product Labeling
    4. 7.4 Manual Information to the End User
  9. 8 Applications, Implementation, and Layout
    1. 8.1 Application Information
      1. 8.1.1 Typical Application
        1. 8.1.1.1 Autonomous Mode
        2. 8.1.1.2 Secondary Device Mode
    2. 8.2 Test Results
  10. 9 Device and Documentation Support
    1. 9.1 Device Nomenclature
    2. 9.2 Device Marking
    3. 9.3 Documentation Support
    4. 9.4 Support Resources
    5. 9.5 Trademarks
    6. 9.6 Electrostatic Discharge Caution
    7. 9.7 Glossary
  11. 10Reflow Information
  12. 11Revision History
  13. 12Mechanical, Packaging, and Orderable Information
5.11.2.3.1 Data Format for Host Communication over SPI

The SPI packet format consists of the SPI header and SPI command/ response data.

IWRL6432WMOD SPI Data Format Figure 5-9 SPI Data Format

The SPI header of 16 bytes is further divided with CRC-32 for message authentication , command or response Identifier, long and short message size with few reserved bytes.

Byte Offset Field Name Size (bytes) Description
0-3 CRC-32 4 CRC-32 computed over bytes 4–15 of the header and the full payload. Used for message authentication.
4-5 Message ID 2 Identifies the command (host-to-module) or response (module-to-host). See API command table.
6-7 Short Message Length 2 Length of the payload when payload is 255 bytes or less. Set to 0xFFFF if long length is used.
8-11 Long Message Length 4 Length of the payload when payload exceeds 255 bytes. Set to 0x00000000 if short length is used.
12-15 Reserved 4 Set to 0x00000000. Must not be modified.
IWRL6432WMOD SPI Header Format Figure 5-10 SPI Header Format

The SPI command/response is further divided to command header and variable length command/response. The max variable length can be 106bytes.

IWRL6432WMOD SPI Command Format Figure 5-11 SPI Command Format
Byte Offset Field Name Size (bytes) Description
0-1 Command/Response Code 2 Opcode identifying the specific API command or response type.
2-3 Payload Sub-length 2 Length of the variable data field that follows.
4-N Variable Data 0-102 Command arguments or response data. Format is command-specific. Maximum 102 bytes.
Note: The combined header (16 bytes) and payload (max 106 bytes) make the maximum SPI transaction size 122 bytes. Buffers allocated in the host MCU must accommodate this maximum.