ATmega324P datasheet(17/377 Pages) ATMEL

部件名	ATmega324P

功能描述	8-bit Microcontroller with 16/32/64K Bytes In-System Programmable Flash

PDF	377 Pages

Scroll/Zoom	100%

制造商	ATMEL [ATMEL Corporation]

网页	http://www.atmel.com

标志

17 / 377 page

7674F–AVR–09/09

ATmega164P/324P/644P

5.7.1

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 exe-

cuted. 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 exe-

cution 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 incre-

mented by three, and the I-bit in SREG is set.

ATmega324P 数据表(PDF) 17 Page - ATMEL Corporation