6-72
IM 701310-01E
CS, Clock, and Data
You can select the CS (chip select), clock, and data from CH1 to CH4.
• CS
You can select the CS level for activating the data.
H
When the signal is high
L
When the signal is low
• Clock
You can select the clock edge that specifies when the data patterns are compared.
On the rising edge
On the falling edge
Trigger Level
When the CS, clock, or data is set to CH1 to CH4, you can set the trigger level for each
source.
• The selectable range is 8 divisions within the screen. The resolution is 0.01 divisions.
For example, if the T/div setting is 2 mV/division, the resolution is 0.02 mV.
• You can reset the trigger level to the current offset voltage by pressing RESET.
Hysteresis
See section 6.5 for details.
Trigger Point
The trigger point is determined by the clock polarity setting as follows:
Trigger point when the clock polarity is set to
Clock
Data 1
or
Data 2
Trigger point when the clock polarity is set to
Example
This example displays the data sequence at the byte level (hexadecimal notation) and
indicates the trigger position.
The Data 1 and Data 2 pattern references are set to A1 and A2, respectively.
Shading: Pattern to compare
CS
Active: L
Data 1
Condition: True, Position: 0, Size: 2 bytes, data pattern: A4 and 25
Data 2
Condition: True, Position: 6, Size: 2 bytes, data pattern: 85 and C8
11
A4
25
EA
57
FF
68
00
00
00
Triggers here
A1
00
00
00
00
00
00
00
85
C8
22
A2
CS
Matches Data 1
Matches Data 2
0
1
2
3
4
5
6 (Position)
6.18 Triggering on a SPI Bus Signal
