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ChronosGUI
After the setup wizard completes, start the GUI interface from the Start menu (Start→Texas Instruments→Chronos Eval→TIChronosGUI.exe).
Connect the USB cable to the EVM. If Microsoft Windows prompts you for an appropriate driver, do not use the automatic search option. Select a manual installation. When prompted for the driver location, browse to the Chronos GUI file folder that was created during installation. (If the operating system does not ask for a driver, no additional action is needed.)
Once the USB driver installation completes, the GUI software should connect properly and be ready for use. A green light in the USB communication box indicates a good USB connection; a red light indicates a faulty USB connection. If the connection is not established, attempt to
6ChronosGUI
Figure 5 shows the Chronos GUI used to navigate the EVM software.
Figure 5. TI Chronos Software GUI
6.1Using Software-Enabled Automatic PLL Selection
The software illustration Figure 5 shows the
Step 1. IC Block Configuration and Input Calculator.
Before programming the PLL, the specific EVM block that is being programmed must be selected in the IC Block Config section of the GUI. For any block in the EVM being used, the first row of calculations is useful when trying to investigate the input frequency to the CDCE421 needed to obtain a desired output frequency. The input frequency is obtained by pressing the Calculate button.
Step 2. Store Crystal Frequency.
If a crystal input is used for Block B of the EVM, the crystal frequency must be entered into the space provided; click on the Device_EEPROM
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