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SDS1000X-E User Manual
88
WWW.SIGLENT.COM
I2C Trigger
This part introduces the nine kinds of trigger conditions (Start, Stop, Restart, No Ack,
EEPROM, 7 Addr&Data, 10 Addr&Data and Data Length) and the methods of setting
them.
Trigger Conditions
Start Condition
— the oscilloscope will be triggered when SDA signal transitions from
high to low while the SCL clock is high. If it is chosen as the condition of trigger
(including frame triggers), a restart will be treated as a “Start condition”.
Stop Condition
— the oscilloscope will be triggered when SDA transitions from low to
high while the SCL is high.
Restart
— the oscilloscope will be triggered when another “Start condition” occurs
before a “Stop condition”
.
No Ack
— the oscilloscope will be triggered when SDA data is high during any SCL’s
ACK bit.
EEPROM
— the trigger searches for EEPROM control byte (the value is 1010xxx) on
the SDA bus. And there is a Read bit and a ACK bit behind EEPROM. Using
Limit
Range
softkey to set the qualifier and
Data1
softkey to set the data’s value. If
EEPROM’s data is greater(less, equal) than Data1, the oscilloscope will be triggered
at the edge of ACK bit behind Data byte. It’s unnecessary that the Data byte musts
follow the EEPROM.
7 Address & Data
— the oscilloscope will be triggered when the following conditions
are satisfied.
The address’s length must be 7 bits and the address’s value is the same as set
value.
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