SLWU067D November   2009  – March 2022 ADS4122 , ADS4125 , ADS4126 , ADS4128 , ADS4129 , ADS4142 , ADS4145 , ADS4146 , ADS4149 , ADS41B25 , ADS41B29 , ADS41B49 , ADS58B18 , ADS58B19

 

  1.   Trademarks
  2. 1Overview
    1. 1.1 Purpose
    2. 1.2 EVM Quick-Start Procedure
  3. 2Circuit Description
    1. 2.1 Schematic Diagram
    2. 2.2 Circuit Function
      1. 2.2.1 Power
        1. 2.2.1.1 Power Supply Option 1
        2. 2.2.1.2 Power Supply Option 2
        3. 2.2.1.3 Power Supply Option 3
      2. 2.2.2 Clock Input
        1. 2.2.2.1 Clock Option 1
        2. 2.2.2.2 Clock Option 2
        3. 2.2.2.3 Clock Option 3
      3. 2.2.3 Analog Inputs
        1. 2.2.3.1 Analog Input Option 1
        2. 2.2.3.2 Analog Input Option 2
      4. 2.2.4 Digital Outputs
  4. 3TI ADC SPI Control Interface
    1. 3.1 Installing the ADC SPI Interface
    2. 3.2 Setting Up the EVM for ADC SPI Control
    3. 3.3 Using the TI ADC SPI Interface Software
      1. 3.3.1 SPI Register Writes
  5. 4Quick Start Setup
  6. 5Evaluation
    1. 5.1 Register Programming
    2. 5.2 Quick-Test Results

3.3.1 SPI Register Writes

By default the ADS41xx EVM is configured to allow access of the register space in the ADS41xx using the TI ADC SPI user interface. The GUI contains a main and an advanced page but most of the programming can be done on the main tab.

The main page (see Figure 3-2) provides bit switches for easy access of the most frequently used registers. It also offers the option of directly writing data into registers through the address and data field. Additional features like clock edge control or offset compensation are located on the advanced page of the GUI (see Figure 3-3). Current registers being written are displayed on the right side in hexadecimal format as well as in Boolean format on the bottom (16-bit total – 8-bit address and 8-bit data). The user also has the option to load or save a register file.

After power up of the EVM, it is recommended to perform a reset of the USB port of the EVM (button on top).

GUID-A78BA031-C796-4FF8-A4BD-604CA2F3F3A5-low.gifFigure 3-2 GUI Main Page
GUID-7A586F31-1FA0-44C6-9FA0-497B09AFC60A-low.gifFigure 3-3 GUI Advanced Page