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2. I2C Decoding
To decode I2C signal:
(1) Connect the clock line (SCLK) and the data line (SDA) of the I2C signal to
the Signal Input Channels of the oscilloscope.
(2) Adjust to the proper time base and voltage division.
(3) In trigger menu, select Bus trigger, and select bus type as I2C, set
parameters based on the characteristics of the signal, trigger the signal
correctly and obtain stable display. Refer to "I2C Trigger" on page 51.
(4) Push the Decode button on the front panel. Select bus type as I2C. set
parameters based on the characteristics of the signal. When the
parameters are set correctly, the information carried by the signal will be
displayed.
Tip: If there are repetitive menu items in both trigger menu and decoding menu,
you can set anyone of them, the other will be changed synchronously.
Decoded information interpretation:
Information
Read Address
Write Address
Data
Note:
⚫ Use the Trigger Level knob to adjust the thresholds of bus trigger and bus
decoding.
⚫ When the ACK (ACKnowledge Character) is not met, two red error marks
will be displayed in the corresponding position in the waveform.
I2C Decoding menu list:
MENU
SETTING
Bus
I2C
Type
Format
Display
EventTable
Save
EventTable
4.Advanced User Guidebook
Abbreviation
R, Read, or do not display
W, Write, or do not display
D, Data, or do not display
INSTRUCTION
Set bus type of decoding as I2C.
Binary
Decimal
Set the display format of the bus.
Hex
ASCII
ON
Select "ON" to display the event table.
OFF
If a USB storage device is currently connected to
the instrument, save the event table data in a .csv
(spreadsheet) formatted file on the external USB
storage device.
57
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