Datasheet

Section 13 Timer G
Rev. 2.00 Jul. 04, 2007 Page 253 of 692
REJ09B0309-0200
Section 13 Timer G
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 canceller, 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.
13.1 Features
• Choice of four internal clock sources (φ/64, φ/32, φ/2, φ
W
/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 canceller eliminates high-frequency component noise in the input capture
input signal.
• Watch mode, subactive mode, or subsleep mode operation is possible when φ
W
/4 is selected as
the internal clock.
• Module standby mode enables this module to be placed in standby mode independently when
it is not in use (for details, see section 6.4, Module Standby Function).