Microchip Technology HV2722, Руководство пользователя

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Installation and Operation

2019 Microchip Technology Inc. DS50002810A-page 21
2.6 TESTING THE HV2722 ANALOG SWITCH EVALUATION BOARD
The user can turn on/off each of the 16 switches through the USB connected PC GUI
software program:
1. Click the
Initialize HV MUX Controller button located at the top left corner.
2. Clear STBY.
3. Select MODE.
4. Put 16-bit data (from bit 15 to bit 0) in DIN to set switches on and off. Bit 31 to
Bit 16 data are not used for the HV2722 Evaluation Board. Data ‘
1
’ means the
switch is on and data ‘
0
’ means the switch is off.
5. Click the Set HV MUX button.
6. Then, the GUI and controller board generate 32-bit data and 32 clocks, followed
by one LE negative pulse, and switches are on and off according to DIN in the
GUI.
7. If the user selects CLR and then clicks the Set HV MUX button, all the switches
are off.
2.7 GENERATION OF PULSER OUTPUT AT SW2A OF HV2722
This section provides the simple step-by-step procedure to make the Ch1 pulser output
at the SW2A SMA connector by configuring the GUI.
1. Before powering up the HV2722 Analog Switch Evaluation Board, make sure
that the latest GUI software is installed on the PC.
2. Start the GUI program. If the board is not connected, a “Not Connected” message
is displayed in the Status bar, located at the bottom left of the screen.
3. Power up the HV MUX Controller Board and HV2722 Analog Switch Evaluation
Board as described in the previous section. The prompt, “Connected”, is
displayed in the Status bar.
4. Click the Initialize HV MUX Controller button and check the Message window
to see “Initialization Complete”.
5. Clear STBY.
6. Select MODE.
7. Change the DIN to Bit 2 from ‘
0
’ to ‘
1
’ to set SW2 on
(DIN =
00000000 00000000 00000000 00000100
).
8. Click the Set HV MUX button to turn on the HV2722 SW2.
9. Change the Pulses to 10.
10. Select CH1.
11. Click the
Start button so that the CH1 pulser starts to generate pulse trains with
10 pulses and a 30 ms T
OFF
time.
The Ch1 and Ch2 of the oscilloscope in Figure 2-9 show the SW2A and the SW3A.
Note: The typical voltage and waveforms are provided in Appendix C. “Demo
Board Waveforms” .