452 Keysight InfiniiVision 3000T X-Series Oscilloscopes User's Guide
28 I2C/SPI Triggering and Serial Decode
Interpreting SPI Decode
• Angled waveforms show an active bus (inside a packet/frame).
• Mid-level blue lines show an idle bus.
• The number of clocks in a frame appears in light-blue above the frame, to the
right.
• Decoded hexadecimal data values appear in white.
• Decoded text is truncated at the end of the associated frame when there is
insufficient space within frame boundaries.
• Pink vertical bars indicate you need to expand the horizontal scale (and run
again) to see decode.
• Red dots in the decode line indicate that there is data that is not being
displayed. Scroll or expand the horizontal scale to view the information.
• Aliased bus values (undersampled or indeterminate) are drawn in pink.
• Unknown bus values (undefined or error conditions) are drawn in red.
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