376 Keysight InfiniiVision 3000 X-Series Oscilloscopes User's Guide
25 I2C/SPI Triggering and Serial Decode
I2C Serial Decode
To set up the oscilloscope to capture I2C signals, see "Setup for I2C Signals" on
page 371.
To set up I2C serial decode:
1 Press [Serial] to display the Serial Decode Menu.
2 Choose 7-bit or 8-bit address size. Use 8-bit address size to include the R/W
bit as part of the address value, or choose 7-bit address size to exclude the
R/W bit from the address value.
3 If the decode line does not appear on the display, press the [Serial] key to turn it
on.
4 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 I2C Decode" on page 377
• "Interpreting I2C Lister Data" on page 378
• "Searching for I2C Data in the Lister" on page 378
For I2C triggering setup see "I2C Triggering" on page 372.
If the setup does not produce a stable trigger, the I2C signals 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.
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