CCS/PGA970EVM: EVM has no function and no activity on any pins (PGA970_FW_Release_1_5_Generic)

Hi Stephan,

The reason why the Firmware is not performing any functions when you load it as is, is because all functions inside the example firmware have been switched OFF. Please look into the pga970_switch.h file for enabling different functions related to this firmware.

Further, for PGA970 Evaluation you don't need to start with the firmware immediately, the GUI alone can also be used to evaluate the device.

In the PGA970 GUI, after placing the device in "Digital Interface" mode, at the "ADC Settings" section and then:

1. Enable VREF Buffer = Enabled, Analog Power = Out of ShutDown Mode

3. Depending on what ADC will you be monitoring you can select ADC1 or ADC2 on the Tabs (Let's will assume ADC1)

4. DEMOD1 Enable = Enabled, TestMux Enable = Enabled, Interfaces& Deci Clk = Enabled

5. Sigma Delta Modulators = Not Reset, Modulator Clock = Not Reset, VCM Enable = Enabled, Output Rate should match Low Pass Filter Output Period

6. All other according to your needs. Also Band-Pass Filter Center Frequency needs to match WFM Frequency at the Waveform Generation tab.

7. On the Right Hand side is where you will generate your output Waveform. Select your options and click the "Populate Waveform Table" button.

8. As values will appear in the table based on your settings, click Write to write these Waveform Samples to the PGA970 device.

9. Click Generate below and the waveform will appear at the P1A and P2A pins on the EVM.

At this point if you have LVDT sensor connected to your EVM, you can click the READ ADC button and get the demodulated voltage based on the position of the LVDT core.

Please see the attached picture for the settings that I have used.

Regards,

Viktor.