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Serial bus analysis
R&S
®
RTA4000
275
User Manual 1335.7898.02 ─ 08
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.
Figure 13-14: Decoded I2C signal with bus table, trigger on frame start
Gray brackets = start and end of the frame
Violet
= address
Blue
= correct data words
Green
= acknowledge bit, ok
Table 13-2: Content of the I
2
C frame table
Column
Description
Start time
Time of the frame start in relation to the trigger point
Type
Value of the R/W bit, read or write access
ID
Hexadecimal value of the address
Length
Number of words in the frame
Data
Hexadecimal values of the data words
State
Overall state of the frame
Remote commands are described in
Chapter 17.11.3.3, "I²C - decode results"
I²C (option R&S
RTA-K1)