Protocol analysis
R&S
®
RTP
527User Manual 1337.9952.02 ─ 12
Some trigger types have additional settings that can be defined. In this case, the
"Define trigger details" button appears next to the "Type" function. Open it for a
detailed definition of the trigger conditions.
Remote command:
TRIGger<m>:I2C:MODE on page 1557
Start ← Trigger type
Sets the trigger to the start of the message. The start condition is a falling edge on
SDA while SCL is high. The trigger instant is the falling edge of the SDA line.
You can change the SDA and SCL lines here if necessary.
Repeated start ← Trigger type
Sets the trigger to a repeated start - when the start condition occurs without previous
stop condition. Repeated start conditions occur when a primary exchanges multiple
messages with a secondary without releasing the bus.
Stop ← Trigger type
Sets the trigger to the end of the message. The stop condition is a rising slope on SDA
while SCL is high.
No Ack (Missing Ack) ← Trigger type
Missing acknowledge bit: the instrument triggers if the data line remains HIGH during
the clock pulse following a transmitted byte.
You can also localize specific missing acknowledge bits by setting the No Ack condi-
tions.
Address ← Trigger type
Sets the trigger to one specific address condition or a combination of address condi-
tions. The trigger time is the falling clock edge of the acknowledge bit after the
address. You can specify:
●
Adress Type
●
"Address" on page 529
●
R/W bit
I²C (option R&S
RTP-K1)
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