MC81F4104B datasheet(79/118 Pages) FINECHIPS

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MC81F4104B Datasheet(PDF) 79 Page - Finechips

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MC81F4104

October 19, 2009 Ver.1.35

Function Description

Interval Timer Mode

A match signal is generated and T3O pins are toggled when the T3CR register value equals the

T3DR register value. The match signal generates a timer match interrupt and clears the T3CR

Capture Mode

In capture mode, you have to set EXT2 interrupt. When the EXT2 interrupt is occurred, the T3CR

And the timer 3 overflow interrupt is generated whenever the T3CR value is overflowed.

So, If you count how many overflow is occurred and read the T3DR value in EXT2 interrupt routine, it

is possible to measure the time between two EXT2 interrupts. Or it is possible to measure the time

from the T3 initial time to the EXT2 interrupt occurred time.

The time = ( 256 * tCLK ) * overflow_count + (tCLK * T3DR)

Note

„tCLK‟ is the period time of the timer-counter‟s clock source

You must set the T3DR value before set the T3SCR register. Because T3DR value is

fetched when the count is started(the T3CC bit is set) or match/overflow event is occurred.

Manufacturer	Part #	Datasheet	Description
Finechips	MC81F4204	3Mb / 150P	ABOV SEMICONDUCTOR 8-BIT SINGLE-CHIP MICROCONTROLLERS
	MC81F4204B	3Mb / 150P	ABOV SEMICONDUCTOR 8-BIT SINGLE-CHIP MICROCONTROLLERS
	MC81F4204D	3Mb / 150P	ABOV SEMICONDUCTOR 8-BIT SINGLE-CHIP MICROCONTROLLERS
	MC81F4204M	3Mb / 150P	ABOV SEMICONDUCTOR 8-BIT SINGLE-CHIP MICROCONTROLLERS
	MC81F4204R	3Mb / 150P	ABOV SEMICONDUCTOR 8-BIT SINGLE-CHIP MICROCONTROLLERS

Manufacturer	Part #	Datasheet	Description
Finechips	MC81F4204	3Mb / 150P	ABOV SEMICONDUCTOR 8-BIT SINGLE-CHIP MICROCONTROLLERS
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