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SDS1000X-E User Manual
91
WWW.SIGLENT.COM
I2C Serial Decode
After completing the setup of I2C signal and trigger, we will decode I2C signals. Operation
steps as follows.
1. Press
Decode
→
Decode
. Select one of the options from the
Decode1
and
Decode2.
2. Press the
Display
and select
On
to display the result of decoding.
3. Press
the
List
to enter the
LIST
function menu.
4. Press the
Display
and choose the same options as the first step.
5. Press the
Lines
and set the number of lines by
Universal Knob
. The range of the lines
is 1 to 7.
6. Press the
Format
to change the character encoding format of the decoding’s result.
7. Press the
Scroll
and turn the
Universal Knob
to view all frames.
Interpreting I2C Decode
The frames of decoding result:
The address value is displayed at the beginning of a frame. The write address is
displayed in green, and read address in yellow.
W/R bit is represented by (W) and (R), following the address value.
The data value is displayed in white.
"~A" after a data or address bits indicates no acknowledgement. For example, DB~A.
indicates there is not enough space on the display to show the complete content
of a frame, and some content is hidden.
Figure 42 I2C Decode Bus Display
The lists of decoding result:
Time — the horizontal displacement between current frame and trigger position.
Address — the address of a frame.
R/W — the type of a frame (write or read).
Data — the value of data.
Figure 43 I2C Decode List Display
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