SLLSFE3 December   2021 TCAN1164-Q1

PRODUCTION DATA  

  1. 1 Features
  2. 2 Applications
  3. 3 Description
  4. 4 Revision History
  5. 5 Description (continued)
  6. 6 Device Comparison Table
  7. 7 Pin Configurations and Functions
  8. 8 Specifications
    1. 8.1 Absolute Maximum Ratings
    2. 8.2 ESD Ratings
    3. 8.3 ESD Ratings IEC Specification
    4. 8.4 Recomended Operating Conditions
    5. 8.5 Thermal Information
    6. 8.6 Power Supply Characteristics
    7. 8.7 Electrical Characteristics
    8. 8.8 Switching Characteristics
    9. 8.9 Typical Characteristics
  9. 9 Parameter Measurement Information
  10. 10Detailed Description
    1. 10.1 Overview
    2. 10.2 Functional Block Diagram
    3. 10.3 Feature Description
      1. 10.3.1  VSUP Pin
      2. 10.3.2  VCCOUT Pin
      3. 10.3.3  Digital Inputs and Outputs
        1. 10.3.3.1 TXD Pin
        2. 10.3.3.2 RXD Pin
      4. 10.3.4  GND
      5. 10.3.5  nRST Pin
      6. 10.3.6  SDO
      7. 10.3.7  nCS Pin
      8. 10.3.8  SCLK
      9. 10.3.9  SDI
      10. 10.3.10 CAN Bus Pins
      11. 10.3.11 Local Faults
        1. 10.3.11.1 TXD Dominant Timeout (TXD DTO)
        2. 10.3.11.2 Thermal Shutdown (TSD)
        3. 10.3.11.3 Under/Over Voltage Lockout
        4. 10.3.11.4 Unpowered Devices
        5. 10.3.11.5 Floating Terminals
        6. 10.3.11.6 CAN Bus Short Circuit Current Limiting
        7. 10.3.11.7 Sleep Wake Error Timer
      12. 10.3.12 Watchdog
        1. 10.3.12.1 Watchdog Error Counter
        2. 10.3.12.2 Watchdog SPI Control Programming
        3. 10.3.12.3 Watchdog Timing
        4. 10.3.12.4 Question and Answer Watchdog
          1. 10.3.12.4.1 WD Question and Answer Basic information
          2. 10.3.12.4.2 Question and Answer Register and Settings
          3. 10.3.12.4.3 WD Question and Answer Value Generation
        5. 10.3.12.5 Question and Answer WD Example
          1. 10.3.12.5.1 Example configuration for desired behavior
          2. 10.3.12.5.2 Example of performing a question and answer sequence
      13. 10.3.13 Bus Fault Detection and Communication
    4. 10.4 Device Functional Modes
      1. 10.4.1 Operating Mode Description
        1. 10.4.1.1 Normal Mode
        2. 10.4.1.2 Silent Mode
        3. 10.4.1.3 Standby Mode
          1. 10.4.1.3.1 Wake-Up Pattern (WUP) Detection in Standby Mode
        4. 10.4.1.4 Reset Mode
        5. 10.4.1.5 Fail-safe Mode
      2. 10.4.2 CAN Transceiver
        1. 10.4.2.1 CAN Transceiver Operation
        2. 10.4.2.2 CAN Transceiver Modes
          1. 10.4.2.2.1 CAN Off Mode
          2. 10.4.2.2.2 CAN Autonomous: Inactive and Active
          3. 10.4.2.2.3 CAN Active
        3. 10.4.2.3 Driver and Receiver Function Tables
        4. 10.4.2.4 CAN Bus States
    5. 10.5 Programming
      1. 10.5.1 Serial Peripheral Interface (SPI) Communication
      2. 10.5.2 Serial Clock Input (SCLK)
      3. 10.5.3 Serial Data Input (SDI)
      4. 10.5.4 Serial Data Output (SDO)
      5. 10.5.5 Chip Select Not (nCS)
      6. 10.5.6 Registers
        1. 10.5.6.1  DEVICE_ID_y Register (Address = 0h + formula) [reset = xxh]
        2. 10.5.6.2  REV_ID_MAJOR Register (Address = 8h) [reset = 00h]
        3. 10.5.6.3  REV_ID_MINOR Register (Address = 9h) [reset = 00h]
        4. 10.5.6.4  SPI_RSVD_x Register (Address = Ah + formula) [reset = 00h]
        5. 10.5.6.5  Scratch_Pad_SPI Register (Address = Fh) [reset = 00h]
        6. 10.5.6.6  MODE_CNTRL Register (Address = 10h) [reset = 04h]
        7. 10.5.6.7  WD_CONFIG_1 Register (Address = 13h) [reset = 54h]
        8. 10.5.6.8  WD_CONFIG_2 Register (Address = 14h) [reset = 02h]
        9. 10.5.6.9  WD_INPUT_TRIG Register (Address = 15h) [reset = 00h]
        10. 10.5.6.10 WD_QA_CONFIG Register (Address = 2Dh) [reset = 0h]
        11. 10.5.6.11 WD_QA_ANSWER Register (Address = 2Eh) [reset = 0h]
        12. 10.5.6.12 WD_QA_QUESTION Register (Address = 2Fh) [reset = 0h]
        13. 10.5.6.13 STATUS (address = 40h) [reset = 00h]
        14. 10.5.6.14 INT_GLOBAL Register (Address = 50h) [reset = 0h]
        15. 10.5.6.15 INT_1 Register (Address = 51h) [reset = 0h]
        16. 10.5.6.16 INT_2 Register (Address = 52h) [reset = 40h]
        17. 10.5.6.17 INT_3 Register (Address 53h) [reset = 0h]
        18. 10.5.6.18 INT_CANBUS Register (Address = 54h) [reset = 0h]
        19. 10.5.6.19 INT_ENABLE_1 Register (Address = 56h) [reset = F3h]
        20. 10.5.6.20 INT_ENABLE_2 Register (Address = 57h) [reset = 3Fh]
        21. 10.5.6.21 INT_ENABLE_3 Register (Address =58h) [reset = 80h]
        22. 10.5.6.22 INT_ENABLE_CANBUS Register (Address = 59h) [reset = 7Fh]
        23. 10.5.6.23 INT_RSVD_y Register (Address = 5Ah + formula) [reset = 00h]
  11. 11Application Information Disclaimer
    1. 11.1 Application Information
    2. 11.2 Typical Application
      1. 11.2.1 Design Requirements
        1. 11.2.1.1 Bus Loading, Length and Number of Nodes
      2. 11.2.2 Detailed Design Procedures
        1. 11.2.2.1 CAN Termination
    3. 11.3 Application Curves
  12. 12Power Supply Requirements
  13. 13Layout
    1. 13.1 Layout Guidelines
    2. 13.2 Layout Example
  14. 14Device and Documentation Support
    1. 14.1 Documentation Support
      1. 14.1.1 Related Documentation
    2. 14.2 Receiving Notification of Documentation Updates
    3. 14.3 Support Resources
    4. 14.4 Trademarks
    5. 14.5 Electrostatic Discharge Caution
    6. 14.6 Glossary
  15. 15Mechanical, Packaging, and Orderable Information

Package Options

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

11.2.1.1 Bus Loading, Length and Number of Nodes

A typical CAN application may have a maximum bus length of 40 meters and maximum stub length of 0.3 m. However, with careful design, users can have longer cables, longer stub lengths, and many more nodes to a bus. A high number of nodes requires a transceiver with high input impedance such as the TCAN1164-Q1

Many CAN organizations and standards have scaled the use of CAN for applications outside the original ISO 11898-2 standard. They made system level trade off decisions for data rate, cable length, and parasitic loading of the bus. Examples of these CAN systems level specifications are ARINC 825, CANopen, DeviceNet, SAE J2284, SAE J1939, and NMEA 2000.

A CAN network system design is a series of tradeoffs. In the ISO 11898-2:2016 specification the driver differential output is specified with a bus load that can range from 50 Ω to 65 Ω where the differential output must be greater than 1.5 V. The TCAN1164-Q1 is specified to meet the 1.5-V requirement down to 50 Ω and is specified to meet 1.4-V differential output at 45Ω bus load. The differential input resistance of the TCAN1164-Q1 is a minimum of 40 kΩ. If 100 TCAN1164-Q1 devices are in parallel on a bus, this is equivalent to a 400-Ω differential load in parallel with the nominal 60 Ω bus termination which gives a total bus load of approximately 52 Ω. Therefore, the TCAN1164-Q1 theoretically supports over 100 devices on a single bus segment. However, for CAN network design margin must be given for signal loss across the system and cabling, parasitic loadings, timing, network imbalances, ground offsets and signal integrity thus a practical maximum number of nodes is often lower. Bus length may also be extended beyond 40 meters by careful system design and data rate tradeoffs. For example, CANopen network design guidelines allow the network to be up to 1 km with changes in the termination resistance, cabling, less than 64 nodes and significantly lowered data rate.

This flexibility in CAN network design is one of the key strengths of the various extensions and additional standards that have been built on the original ISO 11898-2 CAN standard. However, when using this flexibility the CAN network system designer must take the responsibility of good network design to ensure robust network operation.