Siglent SDS-5000X-FG User Manual

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SDS5000X Series Digital Oscilloscope User Manual

16.3 SPI Trigger and Serial Decode

This section covers triggering and decoding SPI signals. Please read the

following for more details: " SPI Signal Settings", " SPI Trigger" and " SPI Serial

Decode".

16.3.1 SPI Signal Settings

Connect the CLK, MOSI, MISO and CS signals to the oscilloscope and set the

mapping relation between channels and signals. Then set the threshold level of

each signal. The process of specifying the source and threshold is similar to "

I2C Signal Settings".

CLK

In addition to specifying the source and the threshold level, for CLK signal it is

also necessary to specify the Edge Select.

 Rising–Data latched on rising edge of the clock.

 Falling–Data latched on falling edge of the clock.

The user can select the edge according to the actual phase relationship

between the clock and data of the SPI bus. Referring to the following figure,

when the falling edge of the clock is aligned with the data, the rising edge is

selected to latch the data. When the rising edge of the clock is aligned with the

data, the falling edge is selected to latch the data.

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Siglent SDS-5000X-FG Waveform Generator Software