27.1.6.4 High and Low Measurement Mode
This mode measures the high and low pulse time of the SMT_signal, relative to the SMT clock. The SMTxTMR register starts incrementing on a rising edge of the input signal. On the falling edge, the SMTxTMR register value is written to the SMTxCPW register. The SMTxTMR register is then reset and continues to increment. On the next rising edge, the SMTxTMR register value is written to the SMTxCPR register. The SMTxTMR register is then reset and continues to increment. Refer to the figures below.