Serial bus analysis
R&S
®
RTM3000
267User Manual 1335.9090.02 ─ 09
Data
Specifies the data pattern if "SPI Trigger" is set to "Serial Pattern". When the instru-
ment detects the specified data pattern, it sets the trigger to the first bit of this pattern.
An example of pattern definition is shown in Figure 13-7.
To enter the binary value of any bit, tap this bit. To enter the hexadecimal value, tap
one of the nibbles (half byte) in the lower data line.
If a nibble (half byte) contains 1, 2 or 3 "X" bits (don't care), the nibble value is repre-
sented by the character "$". If all 4 bits of a nibble are "X", the nibble itself is "don't
care", represented by the character "X".
Remote command:
TRIGger:A:SPI:PATTern on page 614
13.2.4 SPI decode results
When the configuration of the serial bus is complete, the signal can be decoded:
1. In the "Bus" menu, enable "Decode".
2. In the "Display" menu, select the result display settings.
See Chapter 13.1.2, "Displaying decode results", on page 253.
3. In the "Bus Table" menu, enable the "Bus Table". Adjust the table settings.
See also: Chapter 13.1.3, "Bus table: decode results", on page 254
The instrument captures and decodes the signal according to the protocol definition
and the configuration settings.
The color-coding of the various protocol sections and errors simplifies the interpretation
of the visual display. The decode information condenses or expands, depending on the
horizontal scale. Various data formats are available to show the result values.
SPI bus (option R&S RTM-K1)
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