Data Sheet

5 To Trigger the Oscilloscope RIGOL
MSO4000D/S4000 User’s Guide
5-29
SPI Trigger
Trigger on the data pattern on the specified edge. When using the SPI trigger, you
need to specify the SCL, SDA and CS data sources. Below is the sequence chart of
SPI bus data transmission.
Serial Data Line Buffer
(SPIxRXB)
Shift Register
SPIxSR
SPI Buffer
SPIxBUF
Serial Data Line Buffer
(SPIxRXB)
Shift Register
SPIxSR
Serial Transmission Buffer
(SPIxTXB)
SPI Buffer
SPIxBUF
Serial Transmission Buffer
(SPIxTXB)
MSB LSB MSB
LSB
SDIx SDOx
SDIxSDOx
Processor 1 [SPI Host ] Processor 2 [SPI Slave]
SCKx
Serial Clock
SCKx
Trigger Type:
Press Type to select “SPI”. At this point, the trigger setting information as shown in
the figure below is displayed at the upper right corner of the screen.
Source Selection:
Press SCL, SDA and CS to specify the data sources of SCL, SDA and CS respectively.
CH1 to CH4 or D0-D15 can be selected as the
Trigger Source. The current trigger
source is displayed at the upper right corner of the screen.
Trigger Condition:
Press When to select the desired trigger condition.
 CS: trigger when the CS channel is 1 at high level or low level. After this trigger