User manual

Main PSMC Configuration GUI
 2012-2013 Microchip Technology Inc. DS40001671B-page 17
2.14.3 Falling Event Trigger
Click on the switch at the blanking time output to enable or disable the falling event
blanking trigger. Asynchronous inputs are selected for falling event blanking
individually by closing the switch to the AND gate output in their path.
2.14.4 Asynchronous Input Pin Polarity
One of the asynchronous inputs comes directly from an I/O pin. For example, RB0 is
that input in Figure 2-4. There is a buffer between the input label and the first AND gate.
The polarity of the I/O pin input is selectable by clicking on the output of the buffer.
When the buffer output is a line, clicking on it will change the line to a bubble indicating
that the signal is inverted. Clicking on the bubble will change the output to a line.
2.15 PERIOD EVENT
The period event GUI, shown in Figure 2-5, is opened by clicking on the period event
block in the main GUI. The period event determines the frequency of the PSMC PWM
waveform. Each period event resets the timer. The period event source can be
synchronous or asynchronous.
FIGURE 2-5: PERIOD CONTROL
2.15.1 Synchronous Selection
Synchronous period event selection is made by clicking on the X leading to the upper
input to the output OR gate. When clicked, the X is replaced by a straight line leading
from the period time selection box to the output OR gate. Synchronous period events
can be deselected by clicking on the input line to the OR gate to change it back to a
line terminated with an X.