2-27
IM 701730-51E
SPI Bus Signal Analysis Function
2
Range That Can Be Analyzed
Up to 80000 bytes of analysis data can be displayed. The displayed result varies
depending on the number of bytes analyzed as follows:
• When the total analysis data is less than or equal to 80000 bytes
All points are displayed regardless of the position of the reference point.
• When the total analysis data is greater than 80000 bytes:
The displayed result varies depending on the number of analysis data in the Pre* and
Post* sections as follows:
When the Pre section contains 44000 points and the Post section contains 44000 points, 40000
data points in the Pre section and 40000 data points in the Post section are displayed.
When the Pre section contains 8000 points and the Post section contains 80000 points, 8000
data points in the Pre section and 72000 data points in the Post section are displayed.
When the Pre section contains 80000 points and the Post section contains 8000 points, 72000
data points in the Pre section and 8000 data points in the Post section are displayed.
*
Pre: Before (left of) the reference point, Post: After (right of) the reference point
Analysis Data List (Analysis Result List)
The following four items are displayed.
• Analysis number
• Data1 value (hexadecimal)
• Data2 value (hexadecimal)
• CS signal status or the name of the CS signal whose priority is high
• Analysis Numbers
Up to 80000 bytes can be displayed. Depending on whether the CS signal is ON, the
data of analysis number 0 (byte level) is defined as follows: The data points that are
newer than the data point of analysis number 0 (to the right on the screen) are
assigned numbers 1, 2, 3, and so on as the data points get newer. The data points
that are older than the data point of analysis number 0 (to the left on the screen) are
assigned numbers –1, –2, –3, and so on as the data points get older.
When None of the CS Signals Is ON
The first detected data after the reference point becomes analysis number 0.
Reference point
No.-1
7
8
1
2
3
4
5
6
Data
Clock
7
8
1
2
No.0
No.1
2.5 Analyzing/Searching Data
