H838024 datasheet(323/697 Pages) RENESAS

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Section 9 Timers

Rev. 7.00 Mar 10, 2005 page 281 of 652

REJ09B0042-0700

9.5

Timer G

9.5.1

Overview

Timer G is an 8-bit timer with dedicated input capture functions for the rising/falling edges of

pulses input from the input capture input pin (input capture input signal). High-frequency

component noise in the input capture input signal can be eliminated by a noise canceler, enabling

accurate measurement of the input capture input signal duty cycle. If input capture input is not set,

timer G functions as an 8-bit interval timer.

Features

Features of timer G are given below.

• Choice of four internal clock sources (φ/64, φ/32, φ/2, φw/4)

• Dedicated input capture functions for rising and falling edges

• Level detection at counter overflow

It is possible to detect whether overflow occurred when the input capture input signal was high

or when it was low.

• Selection of whether or not the counter value is to be cleared at the input capture input signal

rising edge, falling edge, or both edges

• Two interrupt sources: one input capture, one overflow. The input capture input signal rising

or falling edge can be selected as the interrupt source.

• A built-in noise canceler eliminates high-frequency component noise in the input capture input

signal.

• Watch mode, subactive mode, or subsleep mode operation is possible when φw/4 is selected as

the internal clock.

• Use of module standby mode enables this module to be placed in standby mode independently

when not used.

H838024 Datasheet(PDF) 323 Page - Renesas Technology Corp