Spi Trigger - Rigol MSO4000 Series User Manual

RIGOL

SPI Trigger

In SPI trigger, if the trigger condition (CS condition or timeout condition) is met, the
oscilloscope will trigger when the specified data is found.
The sequence chart of SPI bus is as shown in the figure below. SCL is the serial clock
line, SDA is the serial data line and CS is the chip select line.
CS
SCL
SDA
Press MENU (in the trigger control area (TRIGGER) at the front panel)  Type, turn
the multi-function knob
Type continuously to switch to "SPI" trigger.
At this point, the trigger setting information (include the trigger type, trigger source
and trigger level/threshold level, as shown in the figure below) is displayed at the
upper-right side of the screen and changes with the trigger setting.
Besides, the data setting area (as shown in the figure below) is displayed at the
bottom of the screen displaying the current data setting information (the data bit
currently selected is highlighted in red) and the data setting information changes
with the data setting.
Set the SPI trigger:
1. Specify the clock line signal source and adjust the trigger
level/threshold level
Press SCL to select CH1 to CH4 or D0 to D15 (please refer to "Trigger

Source") as the channel source of the serial clock line. The signal source
currently selected is displayed at the upper-right side of the screen.
5-42
800.544.2843
Figure 5-4 SPI Bus Sequence Chart
to select "SPI" and press the knob. You can also press
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15
10 20
5 25
0 30
Chapter 5 Trigger
MSO4000/DS4000 User's Guide
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