I2C Trigger - Teledyne LeCroy T3DSO2000A Series User Manual

Note: The synchronization is not automatic. If the settings at one place change, a copy
operation is necessary to re-synchronize.

16.2.2 I2C Trigger

When the protocol is set to I2C, the following trigger conditions can be set: Start, Stop,
Restart, No Ack, EEPROM, or an R/W frame with specific device address and data
value.
Touch Trigger Setting in the I2C trigger dialog box
to select the trigger condition:
Start
— The oscilloscope will be triggered when the
SDA line transitions from high to low while the SCL
is high.
Stop
— The oscilloscope will be triggered when the
SDA line transitions from low to high while the SCL
is high.
Restart — The oscilloscope will be triggered when
another "Start" occurs before a "Stop".
No Ack — The oscilloscope will be triggered when
the SDA line is high during any SCL's ACK bit.
EEPROM — The trigger searches for the EEPROM control byte
value 1010xxx on the SDA bus. And there is a Read bit and an ACK
bit for the EEPROM. Set the data value and compare type according
to Data1 and Limit Range. If EEPROM's data is greater than (less
than, equal to) Data1, the oscilloscope will be triggered at the edge
of ACK bit after the Data byte. It's not necessary for a Data byte to
follow the EEPROM.
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T3DSO2000A Manual. Page 77