Technical data

Serial Bus Decoding & Triggering, Search & Navigation, and Segmented Acquisition Labs 4
4000 X-Series Oscilloscopes Advanced Training Guide 89
15 Tap the Clock softkey twice to open the menu; then double- tap D7 to set
it as as the clock source.
16 Press the (Back) front panel button to return to the previous menu.
17 Tap the MOSI softkey; then select D9.
18 Press the (Back) front panel button to return to the previous menu.
19 Tap the MISO softkey; then select D8.
20 Press the (Back) front panel button to return to the previous menu.
21 Tap the CS softkey; then tap the ~CS softkey; then select D6 using the
Entry knob.
22 Press the [Label] front panel key to turn on the scope’s default labels.
Your scope should now be decoding the MOSI and MISO serial data lines
similar to Figure 56. However, the scope is not yet triggering on these
signals. The scope should be randomly auto triggering because the default
trigger condition is to trigger on a rising edge of channel- 1. But there are
no signals present on the channel- 1 input. Let’s now set up the scope to
trigger on a MOSI data byte equal to 0000 0011 (03
HEX
).
23 Press the [Trigger] front panel key; then select Serial 1 (SPI).
Figure 56 Decoding a 4-wire SPI serial bus.
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