Protocol analysis
R&S
®
RTE
534User Manual 1326.1032.02 ─ 20
No Ack bit is sent according to the protocol definition and is not an error. Thus, the
decode results in the table indicate "Ack" for the second frame.
Figure 13-5: Decoded I2C signal with incomplete data, and decode results
magenta frame
header
= incomplete frame, missing bits in data words
dark orange frame
header
= insufficient frame (end of acquisition before decoding has been completed), with
transfer direction and address value
red = insufficient data word (end of acquisition before end of word)
The "Decode results" box shows the detailed decoded data for each data frame.
Table 13-2: 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
Label Symbolic label name defined in the label list
R/W bit Value of the R/W bit
Ack bit Value of the address acknowledge bit
I²C (option R&S RTE-K1)
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