3-13
IM 701450-51E
SPI Bus Signal Analysis Function
3
Setting the Combination Trigger
A trigger can be activated on the combination of the trigger conditions of the SPI Bus
signal and the trigger conditions of CH5 to CH8. You can select from the following three
types.
SPI Only
Activates a trigger only on the trigger conditions of the SPI Bus signal. Only SPI Only is
selectable on the DL7440.
Condition met
Trigger activated here
CH5 to CH8 are irrelevant
SS(CH4)
SCK(CH1)
MOSI(CH2)
MISO(CH3)
CH5
1
2
3
4
5
6
5
6
7
8
.....
Trigger condition of the SPI Bus Signal is met
1
2
7
8
SPI on Pattern
Activates a trigger only when the trigger conditions of the SPI Bus signal are met while
the trigger conditions of CH5 to CH8 are met.
Condition not met
Trigger does not activate
Condition met
Trigger activated here
SS(CH4)
SCK(CH1)
MOSI(CH2)
MISO(CH3)
CH5
1
2
3
4
5
6
5
6
7
8
.....
Trigger condition of the
SPI Bus Signal is met
1
7
8
CH5 = H, Condition = True
Trigger condition of the
SPI Bus Signal is met
• Slope of CH1 (SCK) Edge
Select the slope from the following:
Rising edge
Falling edge
• Enable State of CH4 (SS)
Select the state from the following:
H Status when the SS signal is above the trigger level. A trigger is activated when the SS
signal is high.
L Status when the SS signal is below the trigger level. A trigger is activated when the SS signal
is low.
3.4 Setting SPI Bus Signal Acquisition Conditions