SLUUDA1 April   2025

 

  1.   1
  2.   Description
  3.   Applications
  4.   Features
  5.   5
  6. 1Evaluation Module Overview
    1. 1.1 Introduction
    2. 1.2 Kit Contents
    3. 1.3 Specifications
    4. 1.4 Device Information
  7. 2Hardware
    1. 2.1 Power Requirements
    2. 2.2 Setup
    3. 2.3 Header Information
      1. 2.3.1 USB Interface
      2. 2.3.2 Communication Interfaces
      3. 2.3.3 GPIO Interface (Future Implementation)
    4. 2.4 Jumper Information
      1. 2.4.1 Pull-Up Interface
      2. 2.4.2 1MHz Pull-Up Interface
      3. 2.4.3 MCU Power Headers
    5. 2.5 Push Buttons
    6. 2.6 Interfaces
      1. 2.6.1 Overview
      2. 2.6.2 I2C Interface
      3. 2.6.3 SMBus Interface
      4. 2.6.4 SPI Interface (Future Implementation)
      5. 2.6.5 UART Interface (Future Implementation)
  8. 3Software
    1. 3.1 Software Description
    2. 3.2 Software Installation
    3. 3.3 GUI Installation
    4. 3.4 Software Development
    5. 3.5 Programming Options
  9. 4Hardware Design Files
    1. 4.1 Schematics
    2. 4.2 PCB Layouts
    3. 4.3 Bill of Materials (BOM)
  10. 5Additional Information
    1. 5.1 Trademarks
  11. 6Related Documentation

2.6.3 SMBus Interface

The SMBus interface allows a host computer to interact with nodes implementing the SMBUS protocol. Connect the SCL, SDA, and GND to a target device. If the target is using a voltage not supplied by the EV2500’s LDO system, VVOD can be used to externally pull up the lines. Pin reference is located on the back of the board.

Table 2-3 SMBus Interface
Pin Name Description
1 VSS Ground for SMBus interface.
2 SCL SMBus clock connection. This line can be pulled up to 1.2V, 1.8V, 3.3V, or 5V by the EV2500, or any voltage between 1.2V to 5V externally. Communication speed can be varied between 100kHz, 400kHz, and 1MHz.
3 SDA SMBus data connection. This line can be pulled up to 1.2V, 1.8V, 3.3V, or 5V by the EV2500, or any voltage between 1.2V to 5V externally. Communication speed can be varied between 100kHz, 400kHz, and 1MHz.
4 VVOD Optional Voltage connection. If external PU is chosen, this pin can supply the pull ups. If internal PU is chosen, please ensure no voltage is present on this line.