User manual

Main PSMC Configuration GUI
 2012-2013 Microchip Technology Inc. DS40001671B-page 29
2.19.10 ECCPR: ECC PWM Full-Bridge Mode, Reverse Direction
ECC compatible PWM mode, reverse direction, is selected by clicking on the ECCPR
tab as shown in Figure 2-18. This is a full-bridge driver with two of four outputs,
Channels A and D, active. The Channel A output is the PWM drive and the Channel D
output is true without Pulse-Width Modulation. This mode is intended to drive the high
side and low side of opposite sides of an H-bridge power device configuration. Such
configurations are used in brushed DC motor applications that need both speed and
direction control. This mode is compatible with the Full-Bridge mode of the ECCP
peripheral.
The mode can be changed to the forward direction mode by clicking on the direction
switch or clicking on the ECCPF tab.
When the motor is running and the direction is changed, then the change is
synchronized with the period event and dead-band time is inserted to prevent
shoot-through on either side of the H-bridge. Click on either dead-band block to open
the corresponding dead-band control. See Section 2.19.1 “Dead-Band Control” for
more information.
FIGURE 2-18: ECC PWM FULL-BRIDGE REVERSE