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342
SPI serial bus
The measured signal channel Ch1 is connected to CLK, Ch2 channel is connected to DATA, the bus idle state is
high, the clock rising edge is sampled; the data word length is 4 bits; the CS chip select is off; the trigger mode
matches the “Data” at 0001, please follow the steps below:
(1) Tap S1 to open the decode channel, and click S1 again to open the bus configuration menu;
(2) Select the bus type as “SPI”, click clock as “Ch1” rising edge, the data is “Ch2” high level, and the data
word length is “4bit”;
(3) Open the trigger setting menu, click data on the touch screen, and use the virtual soft keyboard to set the
data to be matched as “0001”;
(4) Adjust the threshold levels of two channels according to signal amplitude; the SPI trigger graphic interface
is shown in Figure 12-20:
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