1-10
IM 701730-51E
Explanation
Setting the Trigger Conditions of the I
2
C Bus Signal: I
2
C Setup
You can set the following conditions.
• Trigger Type of the I
2
C Bus Signal: I
2
C Trigger Type
Select either of the following trigger types.
Adrs&Data
When activating a trigger on the start condition or address pattern/data pattern (address &
data trigger)
Non-ACK
When activating a trigger when an Acknowledge bit is not detected (Non-Ack trigger)
Address & Data Trigger
• When activating a trigger when the start condition is detected
When the start condition is detected, a trigger is activated on the first rising edge of
the SCL signal.
...
...
SDA
SCL
Start condition
1 2 3 4 5 6 7 8 9
Acknowledge bit
Data byte
Trigger activated here
1 2 3 4 5 6 7 8 9
Stop condition
A R/W bit
• When Activating a Trigger on the Address Pattern/Data Pattern
When the data matches the specified address pattern or data pattern, a trigger is
activated on the 9
th
falling edge of the SCL (clock) signal.
...
...
SDA
SCL
Start condition
1 2 3 4 5 6 7 8 9
Acknowledge bit
Data byte
Trigger activated here
1 2 3 4 5 6 7 8 9
Stop condition
A R/W bit
Non-ACK Trigger
• When Activating a Trigger When the Acknowledge Bit Is Not Present (When the
SDA Signal is high)
When an Acknowledge bit is not detected, a trigger is activated on the 9
th
falling edge
of the SCL (clock) signal.
...
...
SDA
SCL
Start condition
1 2 3 4 5 6 7 8 9
Acknowledge bit
Data byte
Trigger activated here
1 2 3 4 5 6 7 8 9
Acknowledge present (L)
Acknowledge not
present (H)
Stop condition
A R/W bit
Note
The Acknowledge bit of the start byte and Hs mode master code is not applicable.
1.4 Setting the I
2
C Bus Signal Acquisition Conditions
