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RIGOL
SPI Decoding (Option)
SPI bus consists of clock line (SCLK) and data line (SDA).
SCLK: sample the SDA on the clock rising edge or falling edge.
SDA: denote the data channel.
If the current trigger type of the trigger system is SPI, pressing CopyTrig can copy
the current SPI trigger settings (include the TimeOut mode, clock channel, data
channel, data bits and so on) and apply them to the SPI decoding function as well as
set the polarity of the SDA data line to high. Then, if needed, you can still set the SPI
decoding parameters according to the introductions below.
Note: The copy function is only available when the current trigger type is "SPI";
otherwise, CopyTrig is not available.
Press Decode1 Decode to select "SPI" and open the SPI decoding function
menu.
1. Decoding Mode Setting
The decoding mode of the oscilloscope is "TimeOut" by default, and no other
alternatives are available.
Press TimeOut and use
the timeout time at a relatively smaller step or turn the outer knob of the
navigation knob to adjust the timeout time at a relatively larger step. The
adjustable range is from 100 ns to 1 s. The default is 1 μs.
2. SCLK Setting
Press SCLK to enter the clock line setting interface.
Press Channel to select either of the channel (CH1 or CH2) as the clock
channel.
7-14
SCLK
SDA
Figure 7-10 SPI Serial Bus
or the inner knob of the navigation knob to adjust
Chapter 7 Protocol Decoding
DS2000E User's Guide
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