Serial Trigger and Decode
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7.1.3 I2C Serial Decode
Once the setup for I2C signal and trigger has been completed, the decoding operation must be setup.
1. Touch Decode followed by the
Decode
softkey.
– Select one of the options from the Decode1 and Decode2.
2. Touch
Display
and select
On
to display the result of decoding.
3. Touch
Next Page
to view page 2/2 of the
Decode
menu.
4. Touch
Format
to change the character encoding format of the decoding’s result.
5. Touch
List
to enter the
List
menu.
6. Touch
Display
and choose the Decode option selected in step 2.
7. Touch
Lines
and set the number of lines by Universal Knob.
– The range of the lines is 1 to 7.
8. Press the
to return to the previous menu.
9. Touch
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 the read
address is displayed 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.
• A red dot indicates there is not enough space on the display to show the complete content of a frame.
Figure 7.6
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 7.7
Decode List Display
Summary of Contents for 2194
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