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AutoFocus User’s Guide
9
©1989-2018 Lauterbach GmbH
Preprocessor AutoFocus I (LA-7991)
There are two types of LA-7991, which can be distinguished with
VERSION.HARDWARE
.
•
The LA-7991 OTP is based on a one-time-programmable FPGA that became obsolete in 2005.
In the
VERSION.HARDWARE
window it is marked with ’(OTP)’.
•
The LA-7991 OTP is succeeded by a re-programmable version.
Both types have a similar performance, but there is a difference in the time resolution when it comes to
adjustment of sampling points. You might notice this in the
Trace.ShowFocus
window. However this should
not impact the actual trace result.
Before 2006 both the OTP as well as its re-programmable successor were shipped. Starting 2006 only the
re-programmable Preprocessor with integrated termination is shipped.
To connect the preprocessor for tracing the target hardware has to be equipped with one or two 38-pin
MICTOR connectors. For dimensions and target connector pinout of the preprocessor refer to the chapter
Technical Data
. All trace signals are connected after plugging the preprocessor (TRACE A) into the target´s
trace connector.
Preprocessors shipped before 2006 might be marked “(OTP)” in the
VERSION.HARDWARE
window, indicating that they are one-time-programmable.
They support only ETM v1-3 pinouts (ARM7/9/10/11). Some CTOOLs pinouts do
not follow the ETM v1-3 specification (e.g. OMAP1030). As a consequence, only
simple tracing without trace compression is possible, or a new preprocessor must
be acquired (e.g. LA-7992).
TRACE A
TRACE B