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Serial bus analysis
R&S
®
RTB2000
222
User Manual 1333.1611.02 ─ 11
12.2.2
SPI configuration
The correct setup of the protocol parameters and the threshold is the condition for
decoding the signal.
To set up and decode an SPI signal (with or without CS)
1. Press the [Protocol] key in the Analysis area of the front panel.
2. Select the bus that you want to use: B1 or B2.
3. Select the "Bus Type" = "SPI (no CS)" or "SPI (with CS)".
4. Select "Configuration".
5. Select the sources of the signal lines, the channels to which the lines are connec-
ted.
6. Set the threshold. Use one of the following methods:
● Tap "Find Threshold". The instrument evaluates the signal and sets the thresh-
old.
● Enter the threshold value in the numeric field.
7. Set the other signal parameters according to the signal characteristics. For details
on settings, see
8. In the "Bus" menu, enable "Decode".
SPI configuration settings
Figure 12-4: SPI (no CS) setup
SPI bus (option R&S
RTB-K1)