Agilent Technologies DSO-X 4022A, Руководство пользователя

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418 Agilent InfiniiVision 4000 X-Series Oscilloscopes User's Guide
25
I2C/SPI Triggering and Serial Decode
•
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.
• 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.
•
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.
SDA
SCL
Control
byte
Read
R/ Ack Data
Ack
Trigger point
Start or
Restart
Condition
SDA
SCL
Stop
Condition
Start or
Restart
Condition
Trigger point
17th clock edge
Address
Read
Write
R/
Ack
Data
Ack
Read
Write
Start
Condition
Address R/W Ack
Data
Ack Data 2
Trigger point
26th clock edge
Ack
Stop
Condition