ATMEGA649 datasheet(132/375 Pages) ATMEL

Part #	ATMEGA649

Description	8-bit Microcontroller with In-System Programmable Flash

PDF	375 Pages

Scroll/Zoom	100%

Manufacturer	ATMEL [ATMEL Corporation]

Direct Link	http://www.atmel.com

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132 / 375 page

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ATmega329/3290/649/6490

2552H–AVR–11/06

• Bit 1 – OCF1A: Timer/Counter1, Output Compare A Match Flag

This flag is set in the timer clock cycle after the counter (TCNT1) value matches the Out-

put Compare Register A (OCR1A).

Note that a Forced Output Compare (FOC1A) strobe will not set the OCF1A Flag.

OCF1A is automatically cleared when the Output Compare Match A Interrupt Vector is

executed. Alternatively, OCF1A can be cleared by writing a logic one to its bit location.

• Bit 0 – TOV1: Timer/Counter1, Overflow Flag

The setting of this flag is dependent of the WGM13:0 bits setting. In Normal and CTC

modes, the TOV1 Flag is set when the timer overflows. Refer to Table 64 on page 128

for the TOV1 Flag behavior when using another WGM13:0 bit setting.

TOV1 is automatically cleared when the Timer/Counter1 Overflow Interrupt Vector is

executed. Alternatively, TOV1 can be cleared by writing a logic one to its bit location.

ATMEGA649 Datasheet(PDF) 132 Page - ATMEL Corporation