Interpreting I2C Decode - Keysight Technologies InfiniiVision 2000 X Series User Manual

Interpreting I2C Decode

• Angled waveforms show an active bus (inside a packet/frame).
• Mid-level blue lines show an idle bus.
• In the decoded hexadecimal data:
• Pink vertical bars indicate you need to expand the horizontal scale (and run
• Red dots in the decode line indicate that more data can be displayed. Scroll or
• Aliased bus values (undersampled or indeterminate) are drawn in pink.
Keysight InfiniiVision 2000 X-Series Oscilloscopes User's Guide
• Address values appear at the start of a frame.
• Write addresses appear in light-blue along with the "W" character.
• Read addresses appear in yellow along with the "R" character.
• Restart addresses appear in green along with the "S" character.
• Data values appear in white.
• "A" indicates Ack (low), "~A" indicates No Ack (high).
• Decoded text is truncated at the end of the associated frame when there is
insufficient space within frame boundaries.
again) to see decode.
expand the horizontal scale to view the data.
I2C/SPI Triggering and Serial Decode
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