Rigol DS2000E Series, Руководство пользователя, Страница: 123 / 283

Chapter 5 To Trigger the Oscilloscope RIGOL
DS2000E User’s Guide 5-41
SPI Trigger
Trigger on the data pattern on the specified edge. When using SPI trigger, you need
to specify the SCL and SDA data sources. Below is the SPI bus data transmission
diagram.
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)
Highest Bit Lowest Bit Highest Bit Lowest Bit
SDIx SDOx
SDIx SDOx
Processor 1[SPI Host] Processor 2[SPI Slave]
SCKx
Serial Clock
SCKx
Figure 5-15 SPI bus data transmission diagram
Trigger Type:
Press Type to open the trigger type list. Rotate
and press down to select
"SPI". At this point, the trigger setting information is displayed at the upper right
corner of the screen. For example, . The trigger type is SPI trigger;
the trigger source is CH1; the trigger level is 0.00 V.
Source Selection:
Press SCL and SDA to specify the data sources of SCL and SDA respectively. They
can be set to CH1 or CH2. For the details, please refer to the introduction in "
Trigger
Source". The current trigger source is displayed at the upper right corner of the
screen.
Note: Select channel with signal input as trigger source to obtain stable trigger.