21
Data Acquisition and Stimulus
State/Timing Modules
VisiTrigger Quickly Locates Your Most Elusive Problems

VisiTrigger technology is a break-

through in logic analysis usability. It

combines increased trigger function-

ality with a user interface that is easy

to understand and use. Now with

VisiTrigger, capturing complex events

is as simple as pointing to the trigger

function and filling-in-the-blanks.

Features and Applications
VisiTrigger • Use graphical views and sentence-like structures to help you
(available in the 16715A, define a trace event.
16716A, 16717A, 16740A, • Select trigger functions as individual trigger conditions or as
16741A, 16742A, 16750A building blocks to easily customize a trigger for your specific task.
16751A, 16752A, and • Set global counters to count events such as the number of times a
16760A state/timing function executes, or the number of accesses to an l/O port.
modules) • Set, clear or evaluate flags by any module in the frame. Flags allow
you to set up a trigger that is dependent on activity from more than
one bus in the system.
• Specify four-way arbitrary IF/THEN/ELSE branching.
Examples of Problems that Can be Captured Easily with VisiTrigger
Description Typical Applications Graphic
Pulse too narrow or too wide Line hangs at wrong level (high or low).
Asynchronous input (for example, an interrupt) persists too long.
Strobe width is too narrow or too wide.
Time between two edges is Excessive delay in responding to a bus grant request.
longer than specified Excessive delay in responding to a data valid with a data
acknowledged.
Pattern lasts longer than a A bus hangs up at a given value.
specified time
Pattern two exists within a An incorrect response to a read or write.
specified time after pattern An incorrect output from a FIFO or bridge.
one is detected
A pattern exists for less A driver is not holding a bus value long enough for a receiver to
than a specified time respond.
Pulse too narrow Pulse too wide
Min width
Max width
OR
time
edge 1 edge 2
pattern
time
pattern 1
pattern 2
time
pattern
time