Keysight Technologies InfiniiVision 3000 X Series, User Manual

Page: 385 / 432

I2C/SPI Triggering and Serial Decode
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Keysight InfiniiVision 3000 X-Series Oscilloscopes User's Guide 385
SPI Serial Decode
To set up the oscilloscope to capture SPI signals, see "Setup for SPI Signals" on
page 379.
To set up SPI serial decode:
1 Press [Serial] to display the Serial Decode Menu.
2 Press the Word Size softkey; then, turn the Entry knob to select the number of
bits in a word.
3 Press the Bit Order softkey; then turn the Entry knob to select the bit order, most
significant bit first (MSB) or least significant bit first (LSB), used when
displaying data in the serial decode waveform and in the Lister.
4 If the decode line does not appear on the display, press the [Serial] key to turn it
on.
5 If the oscilloscope is stopped, press the [Run/Stop] key to acquire and decode
data.
You can use the horizontal Zoom window for easier navigation of the acquired data.
See Also • "Interpreting SPI Decode" on page 386
• "Interpreting SPI Lister Data" on page 387
• "Searching for SPI Data in the Lister" on page 387
NOTE
For SPI triggering setup see "SPI Triggering" on page 383.
NOTE
If the setup does not produce a stable trigger, the SPI signal may be slow enough that the
oscilloscope is AutoTriggering. Press the [Mode/Coupling] key, then press the Mode softkey
to set the trigger mode from Auto to Normal .