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SPI Triggering and Serial Decode
Three simple steps are necessary to trigger and decode the signals: "Setup for SPI
Signals", "SPI Triggering" and "SPI Decode" to trigger and decode the signals.
Setup for SPI Signals
Setting the SPI (Serial Peripheral Interface) signal includes two steps: connecting the
CLK, MISO, MOSI and CS signals to oscilloscope; specifying the parameters of each
input signal.
1.
Press the Decode key to enter the DECODE function menu.
2.
Press the Decode softkey and select the desired decoder (Decode1 or Decode2).
3.
Press Protocol softkey and then select SPI by turning the Universal Knob.
4.
Press Signal softkey to enter the SIGNAL menu as Figure 42 shows.
5.
Set CLK (clock signal):
a.
Press the CLK softkey to enter CLK menu.
b.
Press the CLK softkey to select the channel that is connected to the SPI clock
signal.
c.
Press the Threshold softkey to set the SPI clock signal's threshold voltage level
using the Universal Knob. The threshold voltage level is for decoding, and it will
be used as the trigger voltage level when setting the trigger type to serial.
d.
Press the Edge Select softkey to set the oscilloscope to sample at the
clock signal's rising edge or falling edge.
e.
Press
90 User Manual
Figure 42 SIGNAL Menu
softkey to return to the previous menu.
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