Chapter 4 Specification; I 2 C Bus Signal Analysis Function - YOKOGAWA DL7480 User Manual

Chapter 4 Specification
2
4.1 I C Bus Signal Analysis Function
Applicable Bus
Item
2
I C bus
SM bus
Trigger Function
Item
Trigger source
Start/Stop conditions for
2
I C bus signal trigger
2
I C bus signal trigger
Combination trigger
* CH3 to CH4 on the DL7440
Analysis Function
Item
Signal input
Number of data points that can Up to 40000 bytes (Analysis numbers are assigned in the range of –40000 to 40000 with
be analyzed and displayed
Display of the analysis results
IM 701450-51E
Specifications
Bus transfer rate: Up to 3.4 Mbits/s
Address mode: 7 bits
Conforms to the System Management Bus.
Specifications
CH1: SCL
CH2: SDA
CH3 to CH8*: Analog signal input
Select the start/stop conditions from the following:
• Ignore/Not ignore restart conditions
• Ignore/Not ignore start/stop conditions that do not conform to the protocol
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.
Possible to activate triggers by combining the CH3 to CH8* analog signals and the I
signal (CH1 and CH2).
2
• I C Only: Activates a trigger only on the trigger conditions of the I
2
• I C on Pattern: Activates a trigger when the trigger conditions of the I
the true or false condition of the CH3 to CH8* parallel pattern.
2
• I C -> Pattern: Activates a trigger when the trigger conditions of the parallel pattern of
CH3 to CH8* are met after the trigger conditions of the I
met.
Specifications
Select CH1 (SCL), CH2 (SDA) or CH3 (SCL), CH4 (SDA).
respect to the reference point position.)
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).
4
_
).
2
C bus
2
C bus signal.
2
C bus are met on
2
C Bus signal are
4-1