Agilent Technologies InfiniiVision DSO6014L, Руководство пользователя

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164 6000 Series Oscilloscope User’s Guide
4 Triggering the Oscilloscope
• 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 oscilloscope 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
Read
Ack
Ack
R/
Data
Trigger point
Start or
Restart Condition
Control byte
SDA
SCL
Start or
Restart
Condition
Trigger point
17th clock edge
Address
Read
Write
R/
Ack
Data
Ack
Stop
Condition