Filter
Top Products
3-26
Triggering the Oscilloscope
To use I2C triggering
EEPROM Data Read: 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 scope will trigger on the clock edge for the Ack bit after the
data byte. This data byte does not need to occur directly after the control byte.
Frame (Start: Addr7: Read: Ack: Data) or
Frame (Start: Addr7: Write: Ack: Data): the oscilloscope triggers on a read or write
frame in 7-bit addressing mode on the 17th clock edge if all bits in the pattern
match. For triggering purposes, a restart is treated as a start condition.
SDA
SCL
Start or
Trigger point
Control byte R/W
Ack
Data Ack
Read
Restart Condition
SDA
SCL
Start or
Trigger point
Address R/W Ack Data
Ack
Read
Restart
Stop
Write
Condition
Condition
17th clock edge