Agilent Technologies 6000 Series User Manual page 116

4 Triggering the Oscilloscope
116
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).
6 Return to the previous menu; then, press the Trigger: softkey
to select one of the following I
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
Address
Start
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.
2
C trigger conditions:
Ack Data
R/
6000 Series Oscilloscope User's Guide
Ack
Stop
Condition