AN2395 Freescale Semiconductor / Motorola, AN2395 Datasheet - Page 7

• Manufacturer Part Number: AN2395
• Description: PC Master Software Usage
• Manufacturer: Freescale Semiconductor / Motorola

PC Master Software Recorder
MOTOROLA
Figure 5. PC Master Software Scope Configuration Window
The PC master software Recorder feature is dedicated to watching those fast
changing variable movements that cannot be shown on-line. The recorder is
implemented as a stand-alone routine in the target application code. This
routine controls the sampling in the internal buffer. The Recorder sampling
period is equal to the period required to launch the Recorder routine in the
target application code, and controls the sampling of the internal buffer.
Sampling begins as soon as the recording routine is called; therefore, the
launching period may be in the range of microseconds.
The PC master software Recorder may be configured in many ways, with its
strongest feature being the various definable trigger conditions. In the
configuration window the user can choose positive, negative, or both slopes,
and threshold values for the trigger. The number of pre-trigger samples and the
number of total samples which can be stored in the Recorder buffer, are
sufficient to control monitored movements.
Generally speaking, the Recorder should be used when the Scope is no longer
sufficient because of the high sampling rate or the high amount of data being
transferred through the RS-232 line.
can be obtained when the signal is undersampled. The Scope was configured
to seek new data every 50 ms. Because the saw signal periods are relative to
the sampling period, the acquired data does not correspond with the actual real
shape of the saw signals.
Freescale Semiconductor, Inc.
For More Information On This Product,
PC Master Software Usage
Go to: www.freescale.com
Figure 6
is a typical Scope chart which
PC Master Software Recorder
AN2395/D
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