Protocol analysis
R&S
®
RTP
540User Manual 1337.9952.02 ─ 12
Autoset
Starts software algorithms for determining the signal threshold levels and bitrate.
Remote command:
BUS<m>:FAUToset on page 1549
Frame condition
Defines the start of a frame. A frame contains a number of successive words, at least
one word.
"SS"
Start and end of the frame is defined by the active state of the slave
select signal.
"CLK timeout"
Defines a timeout on the clock line SCLK as limiter between two
frames. The timeout condition is used for SPI connections without an
SS line. Enter the minimum clock idle time in the field.
Remote command:
BUS<m>:SPI:FRCondition on page 1590
Timeout
Sets the minimum clock idle time if a timeout on the clock line SCLK is used as limiter
between two frames.
See also: "Frame condition" on page 540.
Remote command:
BUS<m>:SPI:TIMeout on page 1590
13.3.2.3 Configuring SPI signals
For configuration, assign the lines to the input channels, and define the active states
and the logical thresholds.
For details on configuration settings, see Chapter 13.3.2, "SPI configuration",
on page 536.
1. Press the [Protocol] key on the front panel.
2. Select the tab of the bus you want to set up, for example "SB1".
3. Tap the "Protocol" button and select the protocol: "SPI".
4. Tap the "SCLK Source" button, and select the waveform of the clock line.
5. Set the polarity (clock mode) for SCLK.
6. For each of the available SS, MISO and MOSI lines, assign the waveform. Define
the polarity (active state) of the line.
7. Set the logical thresholds.
8. Set the "Bit order", "Word length", and "Frame condition" according to your signal.
9. Enable "Decode".
SPI bus (option R&S
RTP-K1)
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