I2C Trigger (Option) - Rigol MSO1000Z series User Manual

Chapter 5 To Trigger the Oscilloscope

I2C Trigger (Option)

I2C is a 2-wire serial bus used to connect the microcontroller and its peripheral
device and is a bus standard widely used in the microelectronic communication
control field.
The I2C serial bus consists of SCL and SDA. Its transmission rate is determined by
SCL and its transmission data is determined by SDA, as shown in the figure below.
MSO1000Z/DS1000Z triggers on the start condition, restart, stop, missing
acknowledgement, specific device address or data value. Besides, it can also trigger
on the specific device address and data values at the same time.
Trigger Type:
Press Type to open the trigger type list. Rotate
. At this point, the trigger setting information is displayed at the upper right corner
of the screen.
For example,
source is CH1; the trigger level is 0.00 V.
Source Selection:
Press SCL and SDA to specify the signal sources of SCL and SDA respectively. They
can be set to CH1-CH4 or D0-D15. 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 level to low level while SCL is

high level.
Restart: trigger when another start condition occurs before a stop condition.

Stop: trigger when SDA data transitions from low level to high level while SCL is

high level.
MissedACK: trigger when the SDA data is high level during any

acknowledgement of SCL clock position.
Address: the trigger searches for the specified address value. When this event

MSO1000Z/DS1000Z User's Guide
Figure 5-14 Schematic Diagram of I2C Protocol
. The trigger type is I2C trigger; the current trigger
to select "I2C" and press down
RIGOL
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