SLLU321 July   2022

 

  1.   TCAN1043AEVM Evaluation Module User's Guide
  2.   Trademarks
  3. 1Introduction
    1. 1.1 TCAN1043A-Q1 EVM
    2. 1.2 Applications
  4. 2Test Setup and Results
    1. 2.1 Overview and Basic Operation Settings
      1. 2.1.1 Jumper Description
      2. 2.1.2 Power Supply Inputs VSUP, VCC, and VIO
      3. 2.1.3 TXD Input
      4. 2.1.4 RXD Output
      5. 2.1.5 nSTB and EN Mode Control
      6. 2.1.6 Inhibit (INH) High Voltage Output
      7. 2.1.7 CANH and CANL Bus Pins
      8. 2.1.8 WAKE Input
      9. 2.1.9 nFAULT Output
    2. 2.2 Using CAN Bus Load, Terminations, and Protection Features
    3. 2.3 Using Customer-Installable I/O Options for Current Limiting, Pull Up and Pull Down, Noise Filtering
  5. 3EVM Setup and Basic Usage
    1. 3.1 Equipment
    2. 3.2 TCAN1043A-Q1 EVM Setup
    3. 3.3 TCAN1043A-Q1 Normal Operation 500 kbps Test Results
  6. 4Schematic and Bill of Materials
    1. 4.1 TCAN1043A-Q1 EVM Schematic
    2. 4.2 TCAN1043AEVM Bill Of Materials

2.3 Using Customer-Installable I/O Options for Current Limiting, Pull Up and Pull Down, Noise Filtering

The TCAN1043AEVM has footprints on the PCB for installing various filtering and protection options to adapt the EVM to match CAN network topology requirements, if the EVM is being used as a CAN node.

Each digital input or output pin has footprints allowing for series current-limiting resistors (default populated with 0 Ω), pull up or pull-down resistors (depending on pin used), and a capacitor to GND which allows for RC filters when configured with a series resistor. Table 2-6 lists these features for each of the digital input and output pins of the EVM. Replace or populate the RC components as necessary for the application.

Table 2-6 RC Filter and Protection List
Device Pin Jumper Series R Pull Up
and
Pull Down		 C to GND Description
No. Description Type Pull Up Pull Down
1 TXD Input Not available Not available R3 R2 Pull Up
R4 Pull down		 R4 Use R4 to support a filter capacitor
4 RXD Output Not available Not available R5 Not available C3
6 EN Input Not available JMP2
Position 2		 Not available R12 pull up Not available
7 INH High voltage output Not available Not available Not available R15 pulldown Not available
9 WAKE Input Not available Not available Not available R18, R19 pull up Not available
14 nSTB Input Not available JMP1 Not available R1 pull up Not available