SLLSFV8A July   2024  – November 2024 TCAN1043N-Q1

ADVANCE INFORMATION  

  1.   1
  2. 1 Features
  3. 2 Applications
  4. 3 Description
  5. 4 Pin Configuration and Functions
  6. 5 Specifications
    1. 5.1  Absolute Maximum Ratings
    2. 5.2  ESD Ratings
    3. 5.3  ESD Ratings - IEC Specifications
    4. 5.4  Recommended Operating Conditions
    5. 5.5  Thermal Information
    6. 5.6  Power Dissipation Ratings
    7. 5.7  Power Supply Characteristics
    8. 5.8  Electrical Characteristics
    9. 5.9  Timing Requirements
    10. 5.10 Switching Characteristics
  7. 6 Parameter Measurement Information
  8. 7 Detailed Description
    1. 7.1 Overview
    2. 7.2 Functional Block Diagram
    3. 7.3 Feature Description
      1. 7.3.1 Supply Pins
        1. 7.3.1.1 VSUP Pin
        2. 7.3.1.2 VCC Pin
        3. 7.3.1.3 VIO Pin
      2. 7.3.2 Digital Inputs and Outputs
        1. 7.3.2.1 TXD Pin
        2. 7.3.2.2 RXD Pin
        3. 7.3.2.3 nFAULT Pin
        4. 7.3.2.4 EN Pin
        5. 7.3.2.5 nSTB Pin
      3. 7.3.3 GND
      4. 7.3.4 INH Pin
      5. 7.3.5 WAKE Pin
      6. 7.3.6 CAN Bus Pins
      7. 7.3.7 Faults
        1. 7.3.7.1 Internal and External Fault Indicators
          1. 7.3.7.1.1 Power-Up (PWRON Flag)
          2. 7.3.7.1.2 Wake-Up Request (WAKERQ Flag)
          3. 7.3.7.1.3 Undervoltage Faults
            1. 7.3.7.1.3.1 Undervoltage on VSUP
            2. 7.3.7.1.3.2 Undervoltage on VCC
            3. 7.3.7.1.3.3 Undervoltage on VIO
          4. 7.3.7.1.4 CAN Bus Fault (CBF Flag)
          5. 7.3.7.1.5 TXD Dominant State Timeout (TXDDTO Flag)
          6. 7.3.7.1.6 TXD Shorted to RXD Fault (TXDRXD Flag)
          7. 7.3.7.1.7 CAN Bus Dominant Fault (CANDOM Flag)
      8. 7.3.8 Local Faults
        1. 7.3.8.1 TXD Dominant Timeout (TXD DTO)
        2. 7.3.8.2 Thermal Shutdown (TSD)
        3. 7.3.8.3 Undervoltage Lockout (UVLO)
        4. 7.3.8.4 Unpowered Devices
        5. 7.3.8.5 Floating Terminals
        6. 7.3.8.6 CAN Bus Short-Circuit Current Limiting
    4. 7.4 Device Functional Modes
      1. 7.4.1 Operating Mode Description
        1. 7.4.1.1 Normal Mode
        2. 7.4.1.2 Silent Mode
        3. 7.4.1.3 Standby Mode
        4. 7.4.1.4 Go-To-Sleep Mode
        5. 7.4.1.5 Sleep Mode
          1. 7.4.1.5.1 Remote Wake Request via Wake-Up Pattern (WUP)
          2. 7.4.1.5.2 Local Wake-Up (LWU) via WAKE Input Terminal
      2. 7.4.2 CAN Transceiver
        1. 7.4.2.1 CAN Transceiver Operation
          1. 7.4.2.1.1 CAN Transceiver Modes
            1. 7.4.2.1.1.1 CAN Off Mode
            2. 7.4.2.1.1.2 CAN Autonomous: Inactive and Active
            3. 7.4.2.1.1.3 CAN Active
          2. 7.4.2.1.2 Driver and Receiver Function Tables
          3. 7.4.2.1.3 CAN Bus States
  9. 8 Application Information Disclaimer
    1. 8.1 Application Information
      1. 8.1.1 Typical Application
      2. 8.1.2 Design Requirements
        1. 8.1.2.1 Bus Loading, Length and Number of Nodes
      3. 8.1.3 Detailed Design Procedure
        1. 8.1.3.1 CAN Termination
      4. 8.1.4 Application Curves
    2. 8.2 Power Supply Recommendations
    3. 8.3 Layout
      1. 8.3.1 Layout Guidelines
      2. 8.3.2 Layout Example
  10. 9 Device and Documentation Support
    1. 9.1 Documentation Support
    2. 9.2 Receiving Notification of Documentation Updates
    3. 9.3 Support Resources
    4. 9.4 Trademarks
    5. 9.5 Electrostatic Discharge Caution
    6. 9.6 Glossary
  11. 10Revision History
  12. 11Mechanical, Packaging, and Orderable Information
    1. 11.1 Tape and Reel Information

7.3.7.1 Internal and External Fault Indicators

The following device status indicator flags are implemented to allow for the MCU to determine the status of the device and the system. In addition to faults, the nFAULT terminal also signals wake-up requests and a cold power-up sequence on the VSUP battery terminal so the system can do any diagnostics or cold booting sequence necessary. The RXD terminal indicates wake-up request and the faults are multiplexed (ORed) to the nFAULT output.

Table 7-1 TCAN1043N-Q1 Transceiver Status Indicator
EVENT FLAG NAME CAUSE INDICATORS(1) FLAG IS CLEARED COMMENT
Power-up PWRON Power up on VSUP and any return of VSUP after it has been below UVSUP nFAULT = low upon entering silent mode from standby or sleep mode After a transition to normal mode A cold start condition generates a local wake-up WAKERQ, WAKESR and a PWRON flag.
Wake-up Request WAKERQ(2) Wake-up event on CAN bus, state transition on WAKE pin, or initial power up nFAULT = RXD = low after wake-up upon entering standby mode After a transition to normal mode
or VCC < UVCC(F)
or VIO < UVIO(F) for t ≥ tUV		 Wake-up request may only be set from standby, go-to-sleep, or sleep mode.
Resets timers for UVVCC or UVVIO.
Wake-up Source Recognition(3) WAKESR Available upon entering normal mode(4)
nFAULT = low indicates a local wake-up event from the WAKE pin
nFAULT = high indicates a remote wake-up event from the CAN bus		 After four recessive-to-dominant edges on TXD in normal mode,
leaving normal mode,
or VCC < UVCC(F)
or VIO < UVIO(F) for t ≥ tUV		 A cold start condition generates a local wake-up WAKERQ, WAKESR and a PWRON flag.
Undervoltage UVCC VCC < UVCC(F) Not externally indicated VCC > UVCC(R),
or a wake-up request occurs
UVIO VIO < UVIO(F) Not externally indicated VIO > UVIO(R),
or a wake-up request occurs
UVSUP VSUP < UVSUP(F) Not externally indicated VSUP > UVSUP(R) A VSUP undervoltage event generates a cold start condition once VSUP > UVSUP(R)
CAN Bus Fault CBF See CAN Bus Fault nFAULT = low in normal mode only(5) Upon leaving normal mode,
or if no CAN bus fault is detected for four consecutive dominant-to-recessive transitions of the TXD pin while in normal mode		 CAN bus fault must persist for four consecutive dominant-to-recessive transitions
Local Faults TXDDTO TXD dominant time out, dominant (low) signal for t ≥ tTXDDTO nFAULT = low upon entering silent mode from normal mode RXD = low & TXD = high,
TXD = high &
a mode transition into normal, standby, go-to-sleep, or sleep modes		 CAN driver remains disabled until the TXDDTO is cleared. CAN receiver remains active during the TXDDTO fault
TXDRXD TXD and RXD pins are shorted together for t ≥ tTXDDTO CAN driver remains disabled until the TXDRXD is cleared. CAN receiver remains active during the TXDRXD fault
CANDOM CAN bus dominant fault, when dominant bus signal received for t ≥ tBUSDOM RXD = high,
or a transition into normal, standby, go-to-sleep, or sleep modes		 CAN driver remains enabled during CANDOM fault
TSD Thermal shutdown, TJ ≥ TSDR TJ < TSDF and
RXD = low & TXD = high,
or transition into normal, standby, go-to-sleep, or sleep modes		 CAN driver remains disabled until the TSD event is cleared
(1) VIO and VSUP are present
(2) Transitions to go-to-sleep mode is blocked until WAKERQ flag is cleared
(3) Wake-up source recognition reflects the first wake up source. If additional wake-up events occur the source still indicates the original wake-up source
(4) Indicator is only available in normal mode until the flag is cleared
(5) CAN Bus failure flag is indicated after four dominant-to-recessive edges on TXD