I2C Trigger - Rigol DS6062-DEMO User Manual

I2C Trigger

Trigger on the start condition, restart, stop and missing acknowledgement or on the
read/write frame with specific device address and data value. When using I2C trigger,
you need to specify the SCL and SDA data sources.
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-CH4 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.
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Restart: trigger when another start condition occurs before a stop condition.
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Stop: trigger when SDA data transitions from low to high while SCL is high.
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Missing ACK: trigger when the SDA data is high during any acknowledgement of

SCL clock position.
Address: trigger on the clock (SCL) edge corresponding to the last byte data

(SDA) behind the preset address (Write, Read or R/W direction). After this
trigger condition is selected:
--press the AddrBits softkey to select "7 bit" or "10 bit";
--press the Address softkey to set the address value according to the setting in
AddrBits and the ranges are from 0 to 119 (8 addresses in 1111XXX format are
reserved) and from 0 to 1023 respectively;
--press the Direction softkey to select "Read", "Write" or "R/W".
Data: the trigger searches for the control byte value on the data line (SDA)

following which there is a reading bit and an acknowledgement bit and then
searches for the specified data value and qualifier. During this event, the
oscilloscope will trigger on the clock edge of the acknowledgement bit behind
the data byte. After this trigger condition is selected:
DS6000 User's Guide
RIGOL
5-21