3-16
IM 701450-51E
Examples of SPI Bus Signal Trigger Conditions
The trigger point is set to the position below depending on the SCK edge slope setting
(see page 3-7).
Trigger point when
the SCK edge slope is
SCK
1
2
3
4
5
6
7
8
MOSI
or
MISO
Trigger point when
the SCK edge slope is
This section will indicate the data sequence at the byte level in hexadecimal and indicate
the position where the trigger will occur.
The shaded section is the figure indicates the byte pattern (sequence) that is compared.
• Slave Select Assert Trigger
Trigger Condition
SS:
L
A Pattern (MOSI):
Not applicable
B Pattern:
Not applicable
<Byte Count=0>
11
A4
25
EA
57
FF
68
00
00
00
Trigger activated here
MOSI
00
00
00
00
00
00
00
85
C8
22
MISO
SS
<Byte Count=3>
11
A4
25
EA
57
FF
68
00
00
00
Trigger activated here
MOSI
00
00
00
00
00
00
00
85
C8
22
MISO
SS
Skip 3 bytes
• Activate a Trigger Only on Pattern A
Trigger Condition
SS:
L
A Pattern (MOSI):
A4 25
Data Byte: 2
Condition:
True
B Pattern:
Not applicable
11
A4
25
EA
57
FF
68
00
00
00
Trigger activated here
MOSI
00
00
00
00
00
00
00
85
C8
22
MISO
SS
Matches with the specified Pattern A
Compare with Pattern A
3.4 Setting SPI Bus Signal Acquisition Conditions