6-52
IM 701310-01E
NON ACK Mode
The DL9000 triggers when the acknowledge bit is Nack (when the SDA signal is high).
You can select whether use or ignore the following acknowledge bits for triggering: start
byte, HS mode master code, and read access byte.
...
...
SDA
SCL
Start condition
1 2 3 4 5 6 7 8 9
Acknowledge bits
Data byte
Triggers here
1 2 3 4 5 6 7 8 9
Acknowledge (L)
Nack(H)
Stop condition
Address and R/W bits
General Call Mode
The DL9000 triggers on the general call address (0000 0000).
• Second Byte
You can use the second byte address pattern (the byte after the general call address)
as a trigger condition. The second byte trigger condition is met when the specified
pattern matches the input signal pattern.
X
Not used as a trigger condition
0000 0100
When the input signal pattern matches the pattern 0000 0100 (0x04)
0000 0110
When the input signal pattern matches the pattern 0000 0110 (0x06)
7bit Master Address
When the input signal pattern matches the specified pattern
If you select 7bit Master Address, you can use the data pattern as
a trigger condition as described in the next section.
• Data
The conditions and settings are the same as those explained on page 6-51. See the
respective item for details.
• Example
This example displays the data sequence at the byte level (hexadecimal notation) and
indicates the trigger position. The following notations are used in the figure.
S: Start condition, P: Stop condition, Shading: Compared pattern
Trigger only on the general call address
Mode
General Call
Second Byte
X
S
27
AE
57
27
FE
98
99
27
P
00
2. Triggers here
Address and R/W bits
1. Determines whether the first byte is a general call address
Trigger when the second byte address is 06
Mode
General Call
Second Byte
0000 0110
S
06
AE
57
27
FE
98
99
27
P
00
3. Triggers here
Address and R/W bits
1. Determines whether the first byte is a general call address
2. Determines whether the address pattern is 06
6.15 Triggering on an I
2
C Bus Signal
