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HD6433832S Datasheet, PDF (225/560 Pages) Renesas Technology Corp – single-chip microcomputers | |||
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9.6 Timer G
9.6.1 Overview
Timer G is an 8-bit timer, with input capture functions for separately capturing the rising edge and
falling edge of pulses input at the input capture pin (input capture input signal). Timer G has a
built-in noise canceller circuit that can eliminate high-frequency noise from the input capture
signal, enabling accurate measurement of its duty cycle. When timer G is not used for input
capture, it functions as an 8-bit interval timer.
Features
Features of timer G are given below.
⢠Choice of four internal clock sources (Ï/64, Ï/32, Ï/2, ÏW/2)
⢠Input capture function
Separate input capture registers are provided for the rising and falling edges.
⢠Counter overflow detection
Can detect whether overflow occurred when the input capture signal was high or low.
⢠Choice of counter clear triggers
The counter can be cleared at the rising edge, falling edge, or both edges of the input capture
signal.
⢠Two interrupt sources
Interrupts can be requested by input capture and by overflow. For input capture, the rising or
falling edge can be selected.
⢠Built-in noise-canceller circuit
The noise canceller circuit can eliminate high-frequency noise in the input capture signal.
⢠Operates in subactive and subsleep modes
When ÏW/2 is selected as the internal clock source, timer G can operate in the subactive and
subsleep modes.
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