ATMEGA640 datasheet(19/436 Pages) MICROCHIP

부품명	ATMEGA640

상세설명	8-bit Microcontroller with 16/32/64KB In-System Programmable Flash

PDF	436 Pages

Scroll/Zoom	100%

제조업체	MICROCHIP [Microchip Technology]

홈페이지	http://www.microchip.com

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19 / 436 page

ATmega640/V-1280/V-1281/V-2560/V-2561/V [DATASHEET]

DS40002211A

7.8.1

Interrupt Response Time

The interrupt execution response for all the enabled AVR interrupts is five clock cycles minimum. After five clock

cycles the program vector address for the actual interrupt handling routine is executed. During these five clock

cycle period, the Program Counter is pushed onto the Stack. The vector is normally a jump to the interrupt routine,

and this jump takes three clock cycles. If an interrupt occurs during execution of a multi-cycle instruction, this

instruction is completed before the interrupt is served. If an interrupt occurs when the MCU is in sleep mode, the

interrupt execution response time is increased by five clock cycles. This increase comes in addition to the start-up

time from the selected sleep mode.

A return from an interrupt handling routine takes five clock cycles. During these five clock cycles, the Program

Counter (three bytes) is popped back from the Stack, the Stack Pointer is incremented by three, and the I-bit in

SREG is set.

ATMEGA640 데이터시트(PDF) 19 Page - Microchip Technology