Agilent Technologies 6000 Series manual Start Address Ack Data

4 Triggering the Oscilloscope

Data needs to be stable during the whole high clock cycle or it will be interpreted as a start or stop condition (data transitioning while the clock is high).

6Return to the previous menu; then, press the Trigger: softkey to select one of the following I2C trigger conditions:

•Start Condition — The oscilloscope triggers when SDA data transitions from high to low while the SCL clock is high. For triggering purposes (including frame triggers), a restart is treated as a start condition.

•Stop Condition — The oscilloscope triggers when data (SDA) transitions from low to high while the clock (SCL) is high.

SDA

SCL

Start Address	R/	Ack	Data	Ack		Stop
Condition					Condition

•Missing Acknowledge — The oscilloscope triggers when SDA data is high during any Ack SCL clock bit.

•Address with no Ack — The oscilloscope triggers when the acknowledge of the selected address field is false. The R/W bit is ignored.

•Restart — The oscilloscope triggers when another start condition occurs before a stop condition.

166 6000 Series Oscilloscope User’s Guide