EKTF6708 datasheet(114/158 Pages) EMC

114 / 158 page

eKTF6708

8-Bit Microcontroller

104



IC Product Specification (V1.2) 03.12.2020

(This specification is subject to change without prior notice)

The PDO pin is initialized to “0” during reset. A TCx interrupt is generated each time the

PDO output is toggled.

n-1 n 0

n-1

Clock source

Up-counter

TCxDA

TCx Interrupt

PDO pin

(TCxFF = 0)

PDO pin

(TCxFF = 1)

n 0

Figure 6-15b PDO Mode Waveform



Pulse Width Modulation (PWM)

In Pulse Width Modulation (PWM) Output mode, counting up is performed using the

internal clock with prescaler. The Duty of PWMx is controlled by TCxDB, and the period of

PWMx is controlled by TCxDA. The pulse at the PWMx pin is held to high levels as long as

TCxS=1 or timerx matches TCxDA, while the pulse is held to low levels as long as Timerx

matches TCxDB. Once TCxFF is set to 1, PWMx signal is inverted. A TCx interrupt is

generated and defined by TCxIS. On the other hand, the TCxDA and TCxDB can be

written anytime, but the data of TCxDA and TCxDB can only be latched when writing

TCxDA0. Therefore, the new duty and new period of PWM appear at the PMW pin during

the last period

–match.

n-1

n n+1

m-1 m

n+1

m-1 m

Clock source

Up-counter

Duty

TCx Interrupt

n+2

PWM

duty-match

period-match

n-1

n+2

m+1

p-1

Period

Writing period register

period-match

Writing duty register

duty-match

p+1 p+2

q-1

period-match

q+1

Figure 6-15c PWM Mode Waveform

6.9.5 Buzzer Mode

The TCx pin outputs the clock after dividing the frequency.

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