SLVUDQ9 March   2026

 

  1.   1
  2.   Description
  3.   Features
  4.   4
  5. 1Evaluation Module Overview
    1. 1.1 Introduction
    2. 1.2 Kit Contents
    3. 1.3 Specification
    4. 1.4 Device Information
  6. 2Hardware
    1. 2.1 Power Requirements
    2. 2.2 Header and Jumper Information
    3. 2.3 Test Points
  7. 3Hardware Design Files
    1. 3.1 Schematics
    2. 3.2 PCB Layouts
    3. 3.3 Bill of Materials (BOM)
  8. 4Additional Information
    1. 4.1 Trademarks

2.2 Header and Jumper Information

The TCA984649-EVM has four 3-pin headers and eleven 3x2 headers to set up the power supply connection, addresses and pull up resistors. The following is a description of each header.

  1. VDD1 J Header

    Header VDD1 J connects the VDD1 pin to either the external power or to ground via a jumper. If the header is not connected, then the device's supply is left floating. Figure 2-1 shows header VDD1 J.

    1. To connect to the external supply, short the J1-2 location on the header. The External Supply terminal is now supplying the device power.
    2. To connect to ground, short the J2-3 location on the header. The device VDD1 supply pin is now grounded.
  2. VDD2 J Header

    Header VDD2 J connects the VDD2 pin to either the external power or to ground via a jumper. If that header is not connected, then the device's supply is left floating. Figure 2-1 shows header VDD2 J.

    1. To connect to the external supply, short the J2-3 location on the header. The External Supply terminal is now supplying the device power.
    2. To connect to ground, short the J1-2 location on the header. The device VDD2 supply pin is now grounded.
  3. A0 J Header

    Header A0 J connects the address pin A0 to either VDD1 or ground via a jumper. This pin must not be left floating.

    1. To connect to VDD1, short the J2-3 location on the header. A0 is connected to VDD1.
    2. To connect to GND, short the J2-1 location on the header. The A0 pin is now grounded.
  4. A1 J Header

    Header A1 J connects the address pin A1 to either VDD1 or ground via a jumper. This pin must not be left floating.

    1. To connect to VDD1, short the J2-3 location on the header. A1 is connected to VDD1.
    2. To connect to GND, short the J2-1 location on the header. The A1 pin is now grounded.
  5. 3x2 Header "Pin Name" PU

    The 3x2 headers are connected to each I/O of the device. Each one can pull up that line with three different options of resistors: 1k, 4.7k, and 10k. It is highly recommended to pull up the line with one of those values since the I2C bus cannot be left floating.

    1. To connect to a 1k pull up, populate the top row of the header with a jumper. If the header is placed on the right side of the board, then populate the bottom row.
    2. To connect to a 4.7k pull up, populate the middle row of the header with a jumper.
    3. To connect to a 10k pull up, populate the bottom row of the header with a jumper. If the header is placed on the right side of the board, then populate the top row.
TCA984649-EVM Header VDD1 J : J-1(External Supply), J-2(Connection to device VDD1), J-3 (GND)Figure 2-1 Header VDD1 J : J-1(External Supply), J-2(Connection to device VDD1), J-3 (GND)
TCA984649-EVM Header VDD2 J : J-1(GND), J-2(Connection to device VDD2), J-3 (External Supply)Figure 2-2 Header VDD2 J : J-1(GND), J-2(Connection to device VDD2), J-3 (External Supply)
TCA984649-EVM Header A0 J : J-1(GND), J-2(Connection to device A0), J-3 (VDD1)Figure 2-3 Header A0 J : J-1(GND), J-2(Connection to device A0), J-3 (VDD1)
TCA984649-EVM Header A1 J : J-1(GND), J-2(Connection to device A1), J-3 (VDD1)Figure 2-4 Header A1 J : J-1(GND), J-2(Connection to device A1), J-3 (VDD1)
TCA984649-EVM Header 3x2 RESET PU: Top(RESET-1k), Middle(RESET-4.7k), Bottom (RESET-10k)Figure 2-5 Header 3x2 RESET PU: Top(RESET-1k), Middle(RESET-4.7k), Bottom (RESET-10k)