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RIGOL Chapter 8 Protocol Decoding
8-10 MSO2000A/DS2000A User’s Guide
I 2C Decoding (Option)
I2C serial bus consists of the clock line (SCLK) and the data line (SDA).
SCLK: sample the SDA on the clock rising edge or falling edge.
SDA: denote the data channel.
SCLK
SDA
Figure 8-5 I2C Serial Bus
Press Decode1 Decode to select “I2C” and open the I2C decoding function
menu.
If the current trigger type of the trigger system is I2C, pressing CopyTrig softkey
can copy the current I 2C trigger settings (include the clock signal and data signal)
and apply them to the I2C decoding function. Then, if needed, you can still set the
I2C decoding parameters according to the introductions below.
Note: The copy function is only available when the current trigger type is “I2C”;
otherwise, CopyTrig is not available.
1. SCLK Setting
Press SCLK to select any channel (CH1, CH2 or any channel of D0-D15) as the
clock channel.
If the clock channel is set to CH1 or CH2, press SCLKThreshold to set the
threshold of the clock channel. The range of the threshold is decided by the
vertical position and scale, and is from (-5* vertical scale - vertical position) to
(5* vertical scale - vertical position). If the clock channel is set to any channel of
D0-D15, SCLKThreshold will be hidden automatically.
2. SDA Setting
Press SDA to select any channel (CH1, CH2 or any channel of D0-D15) as the
data channel.
If the data channel is set to CH1 or CH2, press SDAThreshold to set the
threshold of the data channel. The range of the threshold is decided by the
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