2-2
IM 701730-51E
2.1 Overview of the SPI Bus Signal Analysis Function
Analysis Function <See page 2-19 for the operating procedure>
When the SPI Bus signal acquisition is stopped, the signal data stored to the acquisition
memory (including the data stored as history waveforms) can be analyzed Analysis is
performed at the byte level (8 bits) by synchronizing to the clock signal.
When the analysis is executed, an analysis result list is displayed on the lower section of
the screen. The analysis data can be displayed in hexadecimal or binary. The analysis
data and the SPI Bus signal can be displayed simultaneously.
1
2
3
4
5
6
7
8
Analysis result
Byte number:
0
Data output signal:
08(HEX)
Data input signal:
C4(HEX)
Chip select signal:
L
Bit order:
MSB First
Clock signal(Clock)
Data output signal
Data input signal
Chip select signal (CS)
0
0
0
0
1
0
0
0
1
1
0
0
0
1
0
0
Note
The notation of the SPI Bus signal on the DL7440/DL7480 differs between the trigger
condition setup menu and the analysis condition setup menu as follows:
Channel
Notation on the trigger condition setup menu
Notation on the analysis condition
setup menu
CH1
SCK (clock signal)
Clock (clock signal)
CH2
MOSI (master output slave input signal)
Data1 (data input/output signal)
CH3
MISO (master input slave output signal)
Data2 (data input/output signal)
CH4
SS (slave select signal)
CS (chip select signal)
Search Function <See page 2-23 for the operating procedure>
Data that matches a specified determination pattern can be searched from the analysis
data (forward search and backward search), and the data that is found can be displayed
expanded on the zoom display. You can set the determination pattern in hexadecimal or
binary and the data length in the range of 1 to 8 bytes. You can also search indefinite
data.
