Agilent Technologies InfiniiVision 3000 User Manual page 364

24
I2C/SPI Triggering and Serial Decode
364
SDA
SCL
Start or Control
Restart byte
Condition
• 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
Address
Start or
Restart
Condition
• Frame (Start: Addr7: Read: Ack: Data: Ack: Data2) or Frame (Start: Addr7: Write:
Ack: Data: Ack: Data2)— The oscilloscope triggers on a read or write
frame in 7- bit addressing mode on the 26th clock edge if all bits in
the pattern match. For triggering purposes, a restart is treated as a
start condition.
Read
Address R/W Ack
Start
Condition
10-bit Write — The oscilloscope triggers on a 10- bit write frame on the
•
26th clock edge if all bits in the pattern match. The frame is in the
format:
Frame (Start: Address byte 1: Write: Address byte 2: Ack: Data)
For triggering purposes, a restart is treated as a start condition.
Read
R/ Ack Data
Trigger point
Read
Write
Data
Ack
R/
Trigger point
17th clock edge
Write
Data
Ack
Agilent InfiniiVision 3000 X-Series Oscilloscopes User's Guide
Ack
Ack Stop
Condition
Data 2
Ack
Stop
Condition
Trigger point
26th clock edge