17.4.3 External Count with External Up/Down Mode

In this mode, the QEAx/EXTCNT input is considered as an external count signal and the QEBx/DIR/GATE input provides the count direction information. The count direction is positive unless overridden by the CNTPOL bit in the QEIx Control register (QEIxCON[3]). Figure 17-3 illustrates the timing diagram of an external count with External Up/Down mode operation.