320 Keysight InfiniiVision 2000 X-Series Oscilloscopes User's Guide
24 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
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
SCL
SDA
Stop
Condition
Start or
Restart
Condition
Trigger point
26th clock edge
Address
1st byte
R/
Ack1
Ack
Address
2nd byte
Write
Ack2
Data
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