3-1
IM 701730-51E
Specification
3
3.1
I
2
C Bus Signal Analysis Function
Applicable Bus
Item
Specifications
I
2
C bus
Bus transfer rate:
Up to 3.4 Mbits/s
Address mode:
7 bits
SM bus
Conforms to the System Management Bus.
Trigger Function
Item
Specifications
Trigger source
CH1:
SCL
CH2:
SDA
CH3 to CH4:
Analog signal input
Start/Stop conditions for
Select the start/stop conditions from the following:
I
2
C bus signal trigger
• Ignore/Not ignore restart conditions
• Ignore/Not ignore start/stop conditions that do not conform to the protocol
I
2
C bus signal trigger
Select from the following two trigger types.
• Address&Data:
Activates the trigger based on the comparison of the specified address
and data.
• Non-ACK:
Activates a trigger when an acknowledge is not present.
For Address&Data trigger, a trigger is activated on the combination (AND logic) of the five
items below. Start Condition and Byte Count are always applicable (enabled). Address, Data
1 and Data 2 can be enabled or disabled.
• Start Condition:
Activates a trigger on the start condition.
• Address:
Activates a trigger on the true/false condition of the result of the comparison
with the address (total of 8 bits comprised of the 7-bit address and R/W
_
).
• Data 1:
Activates a trigger on the true/false condition of the result of the
comparison with the data immediately after the address. The length of
data that is compared is 1 byte.
• Byte Count:
Activates a trigger at the specified number of bytes after the start condition
(after the address if the address is enabled and after Data 1 if Data 1 is
enabled). The selectable range is 0 or 9999.
• Data 2:
Activates a trigger on the true/false condition of the result of the
comparison with the data that is present after the byte count passes.
The length of data that is compared can be set to 1 or 2 bytes.
Select whether to compare the data immediately after the byte count
passes or continue comparing until the stop condition.
Combination trigger
Possible to activate triggers by combining the CH3 to CH4 analog signals and the I
2
C bus
signal (CH1 and CH2).
• I
2
C Only:
Activates a trigger only on the trigger conditions of the I
2
C bus signal.
• I
2
C on Pattern:
Activates a trigger when the trigger conditions of the I
2
C bus are met on
the true or false condition of the CH3 to CH4 parallel pattern.
• I
2
C -> Pattern:
Activates a trigger when the trigger conditions of the parallel pattern of
CH3 to CH4 are met after the trigger conditions of the I
2
C Bus signal are
met.
Analysis Function
Item
Specifications
Signal input
Select CH1 (SCL), CH2 (SDA) or CH3 (SCL), CH4 (SDA).
Number of data points that
Up to 40000 bytes (20000 bytes before and after the reference point)
can be analyzed
Display of the analysis results Displays the analysis results using the following two methods.
• Waveform and the list of analysis results
Simultaneously displays the waveform and the list of analysis results (No. (analysis
number), Hex (hexadecimal display of analysis data), and Ack (Acknowledge bit condition).
• List of detailed analysis results
Displays No. (analysis number and start/stop conditions), Time (time from the analysis
reference), Binary (binary display of the analysis data), Hex (hexadecimal display of analysis
data), and Ack (Acknowledge bit condition).
Chapter 3
Specification
