ChipSHOUTER Users Manual: Pulse Generation
27
Pulse Generation
The ChipSHOUTER involves an advanced pulse trigger system.
This can be used to build a pattern for injecting a fault
into a target device, or working with existing laboratory
equipment. This section describes some of the pulse genera-
tion architecture to help you understand the capabilities of
the ChipSHOUTER.
Generated Pulse vs. Inserted
One of the most critical points to understand that the gen-
erated pulse will not be the same as the inserted pulse.
This is for several reasons, primarily due to (1) saturation
and fundamental physical limits of the injection tips, and
(2) limitations of the ChipSHOUTER. The physical limitations
of the injection tips are responsible for most limitations.
Issues such as the core material saturation result in limits
regarding how many pulses can be inserted in quick succes-
sion.
The ChipSHOUTER oscilloscope probe monitoring points can
be used to monitor the actual inserted pulse. Typically you
can use this to tune the generated pulse to more closely re-
semble the intended injection.
Active-High vs. Active-Low Inputs
The ChipSHOUTER can internally switch between active-high
and active-low trigger operation. This is done because the
external input can be switched from active-high to active-
low, which internally inverts the entire trigger system log-
ic.
The basic pulse generator takes care of this for you,
but the programmable trigger does not. When using the pro-
To Next Page
Loading...