4-65
IM DLM3054-01EN
Every Start
When a start condition is detected, the instrument triggers on the SDA signal’s falling edge.
SDA
SCL
Start condition
Triggers here
Address Data
The instrument triggers on the AND of Address and Data conditions.
If you do not select Address or Data, the instrument triggers on the start condition.
If you select only Address, the instrument triggers on the address acknowledge bit position.
If you select Data, the instrument triggers on the acknowledge bit position of the last byte of the applicable data.
If you specify X in the address or data pattern, the condition is assumed to be met regardless of the
corresponding bit status.
In a address pattern or data pattern setting, if a binary pattern contains any Xs, the corresponding
hexadecimal display will be “$.”
• Trigger Condition (Condition Setup)
On the Condition Setup screen, set the trigger conditions. The instrument triggers based on the Start (start
condition), Address (address pattern), and Data (data pattern) items whose check box is selected.
Start (Start Condition)
If the only trigger condition is the start condition, when a start condition is detected, the instrument triggers on
the SDA signal’s falling edge.
Address
• Type
Set the address type to 7bit Address, 7bit + Sub Address, or 10bit Address.
•
Data Direction Bit Status (Direction)
Set the data direction bit (R/W bit) to don’t care (X), write (Write), or data request (Read). You can set this
when the R/W bit is OFF.
• Address Pattern (Hex/Bin)
Set the address pattern for the data nibble in hexadecimal (Hex) or binary (Bin) notation. The address
trigger condition is met when the specified address pattern matches the input signal address pattern.
If you set the input format to hexadecimal (Hex), the trigger condition is affected by whether the R/W bit is
on or off.
0 1 0 1 0 0 1 1
2
9
5
3
In the binary display, the address and R/W bit
are both in binary (01010011).
In the hexadecimal display when Include R/W
is off, the address is in hexadecimal (0x29),
and the R/W bit is in binary (1).
In the hexadecimal display when Include R/W
is on, the address and R/W bit are both in
hexadecimal (0x53).
1
R/W bit
7-bit Address Example
Address
4 Triggering