Chapter 8 Protocol Decoding RIGOL
MSO4000/DS4000 User’s Guide 8-15
I2C Decoding (Option)
I2C serial bus consists of the clock line (SCLK) and the data line (SDA). The
oscilloscope samples the channel data on the rising edge of the clock signal (if the
source channel is an analog channel, the system will judge each data point as logic
“1” or logic “0” according to the threshold level set).
Press Decode1 Decode, turn the multi-function knob to select “I2C” and
press the knob. You can press Decode continuously to switch to “I2C”.
Set I2C decoding (take Decode1 as an example):
1. Turn on or off the Decode1
Press BusStatus to turn the Decode1 display on or off. You can also press
Decode1 to switch the current on/off status of the Decode1 display. When the
bus display is turned on, the interface is as shown in Figure 8-4.
2. Quickly apply the current I2C trigger setting to I2C decoding
If the current trigger type of the trigger system is I2C, press CopyTrig to copy
the current clock signal and data signal settings (SCL and SDA) of I2C trigger
setting and apply them to the I2C decoding function (SCLK and SDA). If the
source channel is an analog channel, the threshold level setting will also be
copied.
Note: The copy function is only available when the current trigger type is “I2C”;
otherwise, CopyTrig is not available.
Tip
When the current trigger type is “I2C”, performing the copy operation at any time
can quickly apply the current I2C trigger setting (the specified parameters) to I2C
decoding. Then, you can still set the I2C decoding parameters according to the
introductions below.
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