4-5
IM 701450-51E
4
Specification
4.3
SPI Bus Signal Analysis Function
Trigger Function
Item
Specifications
Trigger source
CH1:
SCK
CH2:
MOSI
CH3:
MISO
CH4:
SS
CH5 to CH8:
Analog signal input (only for the DL7480)
SPI bus signal trigger
Activates a trigger on the combination (AND logic) of the following four items. Assertion of SS
and Byte Count are always applicable (enabled). A Pattern and B Pattern can be enabled or
disabled.
• Assertion of SS: Activates a trigger on the assertion of SS.
• A Pattern:
Activates a trigger on true/false condition of the result of the comparison
with the MOSI data immediately after the assertion of SS. The length of
data that is compared can be set to 1 or 8 bytes.
• Byte Count:
Activates a trigger the specified bytes after the assertion of SS (after the A
pattern if A Pattern is enabled). The selectable range is 0 or 1000.
• B Pattern:
Activates a trigger on the true/false condition of the result of the
comparison with the data that is present after the byte count passes. The
data to be compared is selectable between MOSI and MISO. The data
length can be set to 1 to 8 bytes.
Select whether to compare the data immediately after the byte count
passes or continue comparing until the negation of SS.
Combination trigger*
Possible to activate triggers by combining CH5 to CH8 analog signals and the SPI bus signal
(CH1 to CH4).
• SPI Only:
Activates a trigger only on the trigger conditions of the SPI bus signal.
• SPI on Pattern:
Activates a trigger when the trigger conditions of the SPI bus signal are
met on the true or false condition of the CH5 to CH8* parallel pattern.
• SPI -> Pattern:
Activates a trigger when the trigger conditions of the parallel pattern of
CH5 to CH8 are met after the trigger conditions of the SPI Bus signal are
met.
* Only SPI Only is selectable on the DL7440.
Analysis Function
Item
Specifications
Signal input
CH1:
Clock signal (SCK)
CH2:
Data 1 (MOSI)
CH3:
Data 2 (MISO)
CH4 to CH8
*1
or logic input
*2
:
CS signal (SS)
Number of data points that can
Up to 80000 bytes (Analysis numbers are assigned in the range of –80000 to 80000 with
be analyzed and displayed
respect to the reference point position.)
Analysis Result Display
Displays the analysis results using the following two methods.
• Waveform and the list of analysis results
Simultaneously displays the waveform and the list of analysis results (No. (analysis
number), Dt1 (hexadecimal display of the Data 1 value), Dt2 (hexadecimal display of
the Data 2 value), and CS (CS signal status or the CS signal name with high
precedence).
• List of detailed analysis results
Displays No. (analysis number), Time (time from the analysis reference point), Dt1
(hexadecimal or binary display of the Data 1 value), Dt2 (hexadecimal or binary display
of the Data 2 value), CS (CS signal status or the CS signal name with high
precedence).
*1 The maximum number of channels varies depending on the model.
*2 The logic input is optional.
