HD6413258F10V Datasheet, PDF (131/301 Pages) Renesas Technology Corp – Regarding the change of names mentioned in the document, such as Hitachi Electric and Hitachi XX, to Renesas Technology Corp.

Section 7. 16-Bit Free-Running Timer
7.1 Overview
The H8/325 Series has an on-chip 16-bit free-running timer (FRT) module that uses a 16-bit free-
running counter as a time base. Applications of the FRT module include rectangular-wave output
(up to two independent waveforms), input pulse width measurement, and measurement of external
clock periods.
7.1.1 Features
The features of the free-running timer module are listed below.
• Selection of four clock sources
The free-running counter can be driven by an internal clock source (Ø/2, Ø/8, or Ø/32), or an
external clock input (enabling use as an external event counter).
• Two independent comparators
Each comparator can generate an independent waveform.
• Input capture
The current count can be captured on the rising or falling edge (selectable) of an input signal.
• Counter can be cleared under program control
The free-running counter can be cleared on compare-match A.
• Four interrupt sources
Compare-match A and B, input capture, and overflow interrupts are requested independently.
• Noise canceler
A built-in noise canceler can remove high-frequency noise from the pulse signal input at the
input capture pin.
7.1.2 Block Diagram
Figure 7-1 shows a block diagram of the free-running timer.
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