multicomp pro MP720644 User Manual page 43

Normal
Holdoff
2. I2C Trigger
The I2C serial bus consists of SCL and SDA. The transmission rate is
determined by SCL, and the transmission data is determined by SDA. As
shown in below figure, oscilloscope can trigger on the start, restart, stop, ack
lost, specific device address or data value, also device address and data
value at the same time.
In I2C bus trigger mode, the trigger setting information is displayed on
bottom right of the screen, for example,
trigger type is I2C, CH1 trigger level is 0.00mV.
I2C Trigger menu list:
Menu
Bus Type
Source
When
Multicomp-Pro user Manual
Acquire waveform when trigger occurred
When trigger occurs, acquire one waveform
Single
then stop
Setting Instruction
Set vertical channel bus type as I2C
I2C
trigger.
SCL Set SCL.
SDA Set SDA.
Trigger when SDA data transitions from
Start
high to low while SCL is high.
When another start condition occurs
Restart
before a stop condition.
Trigger when SDA data transitions from
Stop
low to high while SCL is high.
Trigger when SDA data is high during
Ack Lost any acknowledgement of SCL clock
position.
Trigger on the read or write bit when the
Addr
preset address is met.
39
, indicates that