2-11
IM 701610-61E
SPI Bus Signal Analysis Function
2
2.4 Analyzing/Searching Data
Explanation
Analyzing Data
Setting the Analysis Conditions
• Setting Clock (CH1)
Setting the Level
Set the level used to determine the rising or falling edge of the clock signal.
Selectable range: 8 divisions within the screen
Resolution:
0.01 divisions (For example, the resolution for 2 mV/div is 0.02
mV.)
Setting the Hysteresis
Selectable range:
0.3 divisions to 4.0 divisions
Setting the Polarity
: Reads the data input/output signal when the signal changes from below the
specified level to above the specified level.
: Reads the data input/output signal when the signal changes from above the
specified level to below the specified level.
• Setting Data1 (CH2) and Data2 (CH3)
Setting the Threshold Level
Set the level used to determine the data channel signal level (0, 1, or indefinite).
Thr Upper:
Signal exceeding this level is determined to be 1.
Thr Lower:
Signal below this level is determined to be 0.
If Thr Lower
≤
data signal level
≤
Thr Upper, the signal level is determined to be
“indefinite data.”
If indefinite data is found, “*” is displayed in the Data1 or Data2 display box at the byte
where the indefinite data exists on the display screen of analysis results.
• Setting the Chip Select Signal (CS)
To set the CS signal, specify CH4.
Setting the Level
Set the level used to determine whether the CH4 signal is high or low as follows:
Selectable range: 8 divisions within the screen
Resolution:
0.01 divisions (For example, the resolution for 2 mV/div is 0.02
mV.)
Selecting the CS Signal State (Enable State)
Select the state from the following:
H: Analyzes the data input/output signal when the CS signal is high.
L: Analyzes the data input/output signal when the CS signal is low.
X: All data input/output signals are analyzed. The byte boundary of the analyzed
signal is the point where the CS signal changes from high to low or low to high.
–: This can be used when the CS signal is not selected. All data input/output signals
are analyzed. The data input/output signal that is delimited byte-wise is analyzed
from the Reference Point.
