Renesas R8C/17 Guide de l'utilisateur télécharger pdf (Page 80)

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Now, we discuss the operation of this timer

using Timer C as reference.

As you know well, Timer C is based on 16

bit counter running from zero with the selected

input clock signal. The content of this timer is

compared with the contents of TM0 register for

every count. When the match is identified, timer

output line changes its level. But the counting of

timer continuous further and the counter contents are

continuously in check for the match with the contents

of other compare register, TM1. When there is a match,

again timer output pin changes its level and at the same time

timer contents are initialized to zero and then the operation continues

further.

Hence, the timer output gets both high and low levels alternatively and a square

waveform is generated.

Apart from the changes at the output pin, interrupts can also be generated for the

content matches of both compare circuits along with the Timer C overflow.

For every match with

the compare register,

timer output pin

changes its level and

at the same time

timer contents are initialized to zero

and then the operation continues

further. Hence, the timer output

gets both high and low levels

alternatively and a square

waveform is gener-

ated.

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Renesas R8C/17 Guide de l'utilisateur Page 80