Hitachi H*/3694F-ZTAT User Manual

Rev. 1.0, 07/01, page 151 of 372

Section 12   Timer W

Timer W has a 16-bit timer having output compare and input capture functions. 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.

•

 

Selection of five counter clock sources: four internal clocks (

φ

, 

φ

/2, 

φ

/4, 

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 12-1 summarizes the timer W functions, and figure 12-1 shows a block diagram of timer W.

TIM08W0A0000_000020010700