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Chapter 12 Serial Bus Trigger and Decode (Optional)
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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:
Figure 12-20 SPI Graphic Interface
SPI decode data packet description:
(1) Decode data packet displays real-time data about the bus activities.
(2) Decode data displays as hexadecimal system.
(3) Data displays in white.
(4) When “?” appears, the time base needs to be adjusted to view decode results.