Triggering the Oscilloscope 4
6000 Series Oscilloscope User’s Guide 169
Press the Data is softkey to set the oscilloscope to trigger
when data is = (equal to), ≠(not equal to), < (less than), or
> (greater than) the data value set in the Data softkey.
The oscilloscope will trigger on the clock edge for the Ack bit
after the trigger event is found. This data byte does not need
to occur directly after the control byte. The oscilloscope will
trigger on any data byte that meets the criteria defined by the
Data is and Data softkeys during a current address read or a
random read or a sequential read cycle.
8If you have set the oscilloscope to trigger on a 7-bit address
read or write frame condition or a 10-bit write frame
condition:
aPress the Address softkey and turn the Entry knob to select
the 7-bit or 10-bit device address.
You can select from an address range of 0x00 to 0x7F
(7-bit) or 0x3FF (10-bit) hexadecimal. When triggering on
a read/write frame, the oscilloscope will trigger after the
start, address, read/write, acknowledge, and data events
occur.
If don't care is selected (0xXX or 0xXXX) for the address,
the address will be ignored. The trigger will always occur
on the 17th clock for 7-bit addressing or 26th clock for
10-bit addressing.
bPress the Data value softkey and turn the Entry knob to
select the 8-bit data pattern on which to trigger.
You can select a data value in the range of 0x00 to 0xFF
(hexadecimal). The oscilloscope will trigger after the start,
address, read/write, acknowledge, and data events occur.
If don't care (0xXX) is selected for data, the data will be
ignored. The trigger will always occur on the 17th clock for
7-bit addressing or 26th clock for 10-bit addressing.
cIf you have selected a three-byte trigger, press the Data2
value softkey and turn the Entry knob to select the 8-bit
data pattern on which to trigger.