Follow the steps below precisely to quickly evaluate the TPS38700-Q1. In this quick start, we will be looking at Enable 1 and Enable 2 signals after the ACT pin is triggered.

1. Make the connections described in Section 4.1. Skip the GUI installation if the TPS38700Q1EVM GUI is already installed.
2. Power the EVM by turning on the power supply. Note that the voltage and current at the supply are 3.3 V and 10 mA.
3. Once the TI's USB Interface Adapter is connected to EVM and the laptop, launch the evaluation software Fusion Digital Power Designer.
4. Click on I2C GUI in the bottom right.
    
   Figure 4-15 Fusion Welcome Window
5. Click on Change Scan Mode to select TPS38700x and then click OK.
    
   Figure 4-16 Fusion Scan Window
   Figure 4-17 Fusion Scan Selection Window
6. Scan for the TPS38700Q1EVM by clicking on "Scan for TPS38700x" on top left of the window.
    
   Figure 4-18 Fusion Scan Window - Scanning for TPS38700Q1EVM
7. Once the EVM is discovered, select Click to Configure (text in blue).
    
   Figure 4-19 Fusion Scan Window - Scan for TPS38700Q1EVM Completed
8. Go to the Sequence Config tab. In the Pins mapping section, change the pin 19's (EN1) Power Up sequence from 1st to 4th sequence. Now, the Enable 1 signal is part of the 4th power-up sequence. Hence, delaying the signal by about 2 ms from Enable 2 signal (which is still part of the first power-up sequence).
    
   Figure 4-20 TPS38700 GUI Window - Sequence Config Tab
9. Change the trigger in the oscilloscope from channel 1 to channel 3 to get the trigger from ACT pin.
10. Set the Function Generator to create a 3.3 V pulse waveform. Turn-on the output from the Function Generator connected to the ACT pin to trigger the power-up sequence.
11. The output at the oscilloscope should look like the Figure 4-21 where green waveform is the pulse to the ACT pin (TP6), red waveform is Enable 2 signal and blue waveform is the Enable 1 Signal.
     
    Figure 4-21 Expected Output Signal