SPI Trigger (Serial Peripheral Interface)

SPI trigger uses Clock / CS / Data channels and Clause Trigger data patterns. Without CS, Frame guard time separates frames.

Wrong Word Size, Clock/CS polarity, or Output Delay can miss or false-trigger. See Settings and Clause Trigger.

Trigger Settings

SPI Trigger Settings

• Channel: Clock / CS / Data0 / Data1 (2–4 channels by mode).
• Use CS: Use Chip Select. Default: checked.
• Frame guard time: Without CS, idle longer than this starts the next frame. Default: 10 µs.
• Clock Mode / CS Mode: Default: index 0 for both.
• Word Size: Default: 8.
• Data Output Delay: Latch delay from the data edge (max 75 ns). Default: 0.
• Clause Trigger: See Clause Trigger.
• State: Data direction and data pattern (up to 8 bytes; unused XXh).
  • Data direction: Data In / Data Out (with Output Delay) / Dual Data / Dual Data (with Output Delay). Default: index 0 (Data In).
  • Data pattern: Default each field XXh.
  • Offset: Any Offset (Default) / Fixed Offset (offset Default 0).

Dual Data illustration

See also

• SPI — Protocol Analyzer settings