Data Sheet

5 To Trigger the Oscilloscope RIGOL

MSO4000D/S4000 User’s Guide

5-27

 Address: trigger on the clock (SCL) edge corresponding to the byte of data (SDA)

behind the preset address (Write, Read or R/W direction). After this trigger

condition is selected:

--press AddrBits to select “7 bit”, “8 bit” or “10 bit”;

--press Address to set the address value according to the setting in AddrBits

and the ranges are from 0 to 127, from 0 to 255 and from 0 to 1023 respectively.

--press Direction to select “Read”, “Write” or “R/W”. Note: When AddrBits is

set to "8 bit", it is not available.

 Data: the trigger searches for the control byte value on the data line (SDA)

following which there is a reading bit and an acknowledgement bit and then

searches for the specified data value and qualifier. When this event occurs, the

oscilloscope will trigger on the clock edge of the acknowledgement bit behind

the data byte. After this trigger condition is selected:

--press Byte Length to set the length of the data and the range is from 1 to 5.

--press CurrentBit to select the desired data bit and the range is from 0 to

(Byte Length×8-1).

--press Data to set the data pattern of the current data bit to X, H or L.

--press AllBits to set the data pattern of all the data bits to the data pattern

specified in Data.

 A&D: trigger when the “Address” and “Data” conditions are met at the same

time. After this trigger condition is selected:

--press AddrBits to select “7 bit”, “8 bit” or “10 bit”.