User Manual

RIGOL 5 To Trigger the Oscilloscope
MSO4000/DS4000 User’s Guide
5-26
I2C Trigger
Trigger on the start condition, restart, stop, missing acknowledgement or on the
read/write frame with specific device address and data value. In I2C trigger, you
need to specify the SCL and SDA data sources. The figure below shows the complete
data transmission of I2C bus.
Trigger Type:
Press Type to select “I2C”. At this point, the trigger setting information as shown in
the figure below is displayed at the upper right corner of the screen.
Source Selection:
Press SCL and SDA to specify the data sources of SCL and SDA respectively. CH1 to
CH4 or D0-D15 can be selected as the
Trigger Source. The current trigger source is
displayed at the upper right corner of the screen.
Trigger Condition:
Press When to select the desired trigger condition.
 Start: trigger when SDA data transitions from high to low while SCL is high.
 Restart: trigger when another start condition occurs before a stop condition.
 Stop: trigger when SDA data transitions from low to high while SCL is high.
 Missing ACK: trigger when the SDA data is high during any acknowledgement of
SCL clock position.