Name: Rigol DS4024
Brand: Rigol
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RIGOL Chapter 8 Protocol Decoding

8-20 MSO4000/DS4000 User’s Guide

SPI Decoding (Option)

The SPI serial bus is based on the master-slave configuration and usually consists of

the chip select line (SS), clock line (SCLK) and data lines. Wherein, the data lines

include the master input/slave output data line (MISO) and master output/slave

input (MOSI) data line. The oscilloscope samples the channel data on the rising edge

or falling edge of the clock signal (if the source is an analog channel, the oscilloscope

will alos judge each data point (logic “1” or logic “0”) according to the preset

threshold level.

Press Decode1  Decode, turn the multi-function knob to select “SPI” and

press the knob. You can also press Decode continuously to switch to “SPI”.

Set the SPI decoding (take Decode1 as an example):

1. Turn on or off the Decode1

Press BusStatus to turn the Decode1 display on or off. You can also press

Decode1 to switch the current on/off status of the Decode1 display. When the

bus display is turned on, the interface is as shown in Figure 8-5.

2. Quickly apply the current SPI trigger setting to SPI decoding

If the current trigger type of the trigger system is SPI, press CopyTrig to copy

the current SPI trigger settings and apply them to the SPI decoding function (set

the corresponding SPI decoding parameters automatically). The settings that

can be copied include the CS/timeout mode, clock channel, data channel and

data bits.

 For the CS mode, the CS channel (CS) and level polarity (Mode) in the

trigger setting will be copied to the CS channel (SS  Channel) and

polarity (SS  Polarity). If the CS channel in the trigger setting is an

analog channel, the threshold level setting will also be copied.

 For the timeout mode, the timeout time setting will be copied.

 If the clock channel is an analog channel, the threshold level setting will be

copied.

 For the data channel, the data channel (SDA) in the trigger setting will be

copied to the MISO source channel (MISO  Channel) in the decoding

Rigol DS4024 User Manual

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