User manual

Protocol Analysis
R&S
®
RTO
266User Manual 1316.0827.02 ─ 06
Additionally, you can display the binary signal and the detailed decoding results, see 
chapter 10.1.2, "Display", on page 251.
Fig. 10-4: Decoded and binary I2C signal, and decode results
green brackets [...] = start and end of frame
yellow = address
blue = correct data
light orange = R/W bit
violet = acknowledge bits
red = No ack (missing acknowledge bit) or incomplete frame
blue block = write frame ok, with transfer direction and address value
green block = read frame ok, with transfer direction and address value
red block = frame is incomplete (end of acquisition before end of frame), with transfer direction and
address value
The "Decode results" box shows the detailed decoded data for each data frame.
Table 10-1: Content of the "Decode results" table
Column Description
State Overall state of the frame.
"Insuffcient waveform length" indicates that the frame
is not completely contained in the acquisition. Change
the horizontal scale, or move the reference point to
the left to get a longer acquisition.
Frame start Time of frame start
Address type Address length, 7 bit or 10 bit
Address value (hex) Hexadecimal value of the address
I²C