MATLAB EMBEDDED IDE LINK 4 - FOR USE WITH TEXAS INSTRUMENTS CODE COMPOSER STUDIO Guia do Utilizador Página 481

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Targ et Preferences
output from the qua lier change s to 0 immediately after the
third consecutive value is rece iv ed .
Qualificati
on using 6 samples
This setting requires six
consecutive
cycles of the same G PIO input value for the output
from the qua
lier to change. In the f ollowing gure, the glitch
A has no effe
ct on the output signal. When the glitch occurs,
the countin
g begins, but the next measurement is low again, so
the count i
s ignored. The output signal does not change until
six consec
utive samples of the high signal are measured.
Qualication sam pling period prescaler
Visible only w hen an appropriate setting for Qualication
type for GP IO [pin#] is selected. The qualication
sampling period prescaler, with possible v alu es of
0 to 255,
calculates the frequency of the qualication samples or the
number of system clock ticks per sample. The formula for
calculating the qualication sampling frequency is:
9-89
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