HD64F2145 datasheet(281/829 Pages) RENESAS

281 / 829 page

Rev. 2.0, 08/02, page 241 of 788

Section 11 16-Bit Free-Running Timer (FRT)

This LSI has an on-chip 16-bit free-running timer (FRT). The FRT operates on the basis of the 16-

bit free-running counter (FRC), and outputs two independent waveforms, and measures the input

pulse width and external clock periods.

11.1

Features

• Selection of four clock sources

One of the three internal clocks (ø/2, ø/8, or ø/32), or an external clock input can be selected

(enabling use as an external event counter).

• Two independent comparators

Two independent waveforms can be output.

• Four independent input capture channels

The rising or falling edge can be selected.

Buffer modes can be specified.

• Counter clearing

The free-running counters can be cleared on compare-match A.

• Seven independent interrupts

Two compare-match interrupts, four input capture interrupts, and one overflow interrupt can be

requested independently.

• Special functions provided by automatic addition function

The contents of OCRAR and OCRAF can be added to the contents of OCRA automatically,

enabling a periodic waveform to be generated without software intervention. The contents of

ICRD can be added automatically to the contents of OCRDM

× 2, enabling input capture

operations in this interval to be restricted.

TIM8FR1A_010020020700

HD64F2145 Datasheet(PDF) 281 Page - Renesas Technology Corp