Figure 12.7 Input Capture Operating Example - Renesas H8 Series Hardware Manual

16-bit single-chip microcomputer

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The TCNT value can be captured into a general register (GRA, GRB, GRC, or GRD) when a

signal level changes at an input-capture pin (FTIOA, FTIOB, FTIOC, or FTIOD). Capture can

take place on the rising edge, falling edge, or both edges. By using the input-capture function, the

pulse width and periods can be measured. Figure 12.7 shows an example of input capture when

both edges of FTIOA and the falling edge of FTIOB are selected as capture edges. TCNT operates

as a free-running counter.

Figure 12.7 Input Capture Operating Example

Rev. 3.00 Sep. 14, 2006 Page 175 of 408

Section 12 Timer W

REJ09B0105-0300