TC35679FSG-002

2018-01-17

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4.6. PWM Interface

TC35679 has a PWM interface that can be used for LED, buzzer control, etc.

The PWM interface has the following features.

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Arbitrary pulse generation function

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It can select the source clock from 13 MHz and 32.768 kHz

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It has 12 bits clock division setting up to 1/4096

8 Hz to 16.384 kHz (32.768 kHz), 3.17 kHz to 6.5 MHz (13 MHz)

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The pulse output can be masked by the regular pattern which period is one second with 50 ms unit width (rhythm function)

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The interrupt can be generated in synchronization with the cycle of 1 s rhythm pattern.

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It can switch the pulse output to Low / High active

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Duty of the pulse output is adjustable.

4.6.1.

Pulse Generation Function

Figure 4-18 shows a brief explanation of the pulse generation. TC35679 can adjust output pulse frequency by changing its cycle.

Also it can adjust on/off ratio by changing its duty.

The frequency (cycle) can be set from 8 Hz to 16.384 kHz for 32.768 kHz clock, and from 3.17 kHz to 6.5 MHz for 13 MHz clock.

The duty can be set from 0 % to 100 %.

Cycle

Duty

Figure 4-18 PWM pulse generation function

Duty Cycle