Rigol MSO8154A Rigol MSO8000A series user guide

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8.7.15 SPI Trigger (Option)

In SPI trigger, after the CS or timeout condition is satisfied, the oscilloscope triggers

when the specified data is found. When using SPI trigger, you need to specify the CLK

clock sources and MISO data sources.

Below is the sequential chart of SPI bus.

SDA

SCL

D6 D5

D4 D3

D2 D1 D0

Figure 8.17 Sequential Chart of SPI Bus

Trigger Type:

Press Type, and then rotate the multifunction knob to select "SPI". Press down the

knob to select the trigger type. Then, the current trigger setting information is

displayed at the upper-right corner of the screen, as shown in the figure below. You

can also press Type continuously or enable the touch screen to select it.

Source Selection:

Press

CLK and MISO to specify the sources of CLK and MISO respectively. They can be

set to CH1-CH4 or D0-D15. For details, refer to descriptions in "

Trigger Source

". The

current trigger source is displayed at the upper-right corner of the screen.

NOTE

Only when we select the channel (that has been input with signals) as the trigger source, can

we obtain a stable trigger.

Edge Type:

Press Slope continuously to select the desired clock edge type. Press down the knob

to select it.

• Rising: samples the MISO data on the rising edge of the clock.

• Falling: samples the MISO data on the falling edge of the clock.

Trigger Condition:

To Trigger the Oscilloscope

116

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Rigol MSO8154A oscilloscope