Datasheet

Section 11 Timer W
TIM08W0A_000020020300 Rev.4.00 Nov. 02, 2005 Page 131 of 304
REJ09B0143-0400
Section 11 Timer W
The timer W has a 16-bit timer having output compare and input capture functions. The timer W
can count external events and output pulses with an arbitrary duty cycle by compare match
between the timer counter and four general registers. Thus, it can be applied to various systems.
11.1 Features
• Selection of five counter clock sources: four internal clocks (φ,φ/2, φ/4, and φ/8) and an
external clock (external events can be counted)
• Capability to process up to four pulse outputs or four pulse inputs
• Four general registers:
 Independently assignable output compare or input capture functions
 Usable as two pairs of registers; one register of each pair operates as a buffer for the output
compare or input capture register
• Four selectable operating modes:
 Waveform output by compare match
Selection of 0 output, 1 output, or toggle output
 Input capture function
Rising edge, falling edge, or both edges
 Counter clearing function
Counters can be cleared by compare match
 PWM mode
Up to three-phase PWM output can be provided with desired duty ratio.
• Any initial timer output value can be set
• Five interrupt sources
Four compare match/input capture interrupts and an overflow interrupt.
Table 11.1 summarizes the timer W functions, and figure 11.1 shows a block diagram of the timer
W.