1-8
IM 701610-61E
Explanation
I
2
C Trigger Type
You can select from the following three types.
• START (Start Trigger)
When a Start condition is detected, a trigger is activated on the first falling 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
Address + R/W bit
• Non-ACK (Non-Ack Trigger)
When the Acknowledge bit is not present (when the SDA signal is set to “H”), a trigger
is activated on the 9
th
falling edge of the SCL (clock) signal.
Address + R/W bit
...
...
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
The Acknowledge bit of the start byte and Hs mode master code is not applicable.
• ADRS (Address Trigger)
When the specified address and data pattern match, a trigger is activated on the 9
th
falling edge of the SCL (clock) signal.
Address + R/W bit
...
...
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
1.3 Setting the Trigger Conditions
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