2-15
IM 701610-61E
SPI Bus Signal Analysis Function
2
2.4 Analyzing/Searching Data
Searching Data
Setting the Search Conditions
• Pattern Search (Frame Pattern)
You can specify a data pattern of Data1 or Data2 in units of bytes and search the
waveform. When a waveform that matches the specified pattern is found, the Zoom
Position moves to that point and displays the searched waveform in the Zoom
window. Set the pattern to be searched in binary or hexadecimal notation. Bits set to
“X” are not searched.
The items to be specified are as follows:
Pattern Format:
Specify the pattern display format. Select Hex (hexadecimal
display) or Bin (binary display).
Source:
Set the target waveform to perform the pattern search to Data1 or
Data2.
Data Byte:
Set the number of data bytes from 1 to 8 (bytes).
Data Pattern:
Set the search pattern using hexadecimal or binary format. The bit
order is set to the format that was specified for the analysis. If the
specified bit contains an X, it is displayed as “$” in hexadecimal
format.
• Indefinite Data Search (Indefinite State)
Searches indefinite data from the analysis result. You cannot perform a pattern
search and an indefinite data search simultaneously.
Note
•
Indefinite data is always considered matched to the specified status.
•
If analysis is performed on a channel of which a CS signal is selected, the data is considered
to be delimited at the point where the state of the CS signal changes. In this case, data
search is also performed by considering the data to be delimited at that point. For example,
when a 5-byte data shown in the following figure is analyzed, the search operation varies
depending on the CS channel specification during the analysis.
•
When analysis is performed by specifying a CS channel
Data search across two CS intervals cannot be performed. Therefore, search is not
possible by setting Data Byte to 4 or 5. (Cannot conclude from the analyzed data.)
•
When analysis is performed without specifying the CS channel
Independent of the chip select interval. Search can be performed by setting Data Byte to
4 or 5.
Example (Enable State = L)
Data
CS
8 bit
8 bit
8 bit
8 bit
8 bit
Executing the Search
Searches data that matches the specified search condition in forward (Prev) and reverse
(Next) directions. When the data matches the search pattern, the corresponding data in
the detailed analysis display on the right side of the screen is highlighted. In addition,
the matched data is displayed expanded in the ZOOM display.
