B+K precision 2510B Series, Руководство пользователя, Страница: 83 / 184

Serial Trigger and Decode 83
7. Press the softkey to return to the previous menu.
6.1.2 I2C Trigger Conditions
After the oscilloscope has been set up to capture I2C signals, you can trigger on the following conditions:
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Start
•
Stop
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Restart
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No Ack
•
EEPROM
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7 Address & Data
•
10 Address & Data
•
Data Length
Start Condition
Triggers when the 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
Triggers when the data (SDA) transitions from low to high while the clock (SCL) is high.
Figure 6.3 Start/Stop Conditions
Restart Condition
Triggers when another start condition occurs before a stop condition.
No Ack
Trigger when SDA data is high during any SCL’s ACK bit.
EEPROM
The trigger looks for EEPROM control byte value 1010xxx on the SDA line, followed by a Read bit and
an Ack bit. It then looks for the data value and qualifier set by the Data softkey and the Data is softkey.
When this event occurs, the oscilloscope will trigger on the clock edge for the Ack bit after the data byte.