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ATMEGA644 Datasheet(PDF) 16 Page - ATMEL Corporation

Part # ATMEGA644
Description  8-bit Microcontroller with 64K Bytes In- System Programmable Flash
PDF  374 Pages
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Manufacturer  ATMEL [ATMEL Corporation]
Direct Link  http://www.atmel.com
Logo ATMEL - ATMEL Corporation

ATMEGA644 Datasheet(HTML) 16 Page - ATMEL Corporation

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2593L–AVR–02/07
ATmega644
When using the SEI instruction to enable interrupts, the instruction following SEI will be exe-
cuted before any pending interrupts, as shown in this example.
Assembly Code Example
sei
; set Global Interrupt Enable
sleep
; enter sleep, waiting for interrupt
; note: will enter sleep before any pending
; interrupt(s)
C Code Example
__enable_interrupt(); /* set Global Interrupt Enable */
__sleep(); /* enter sleep, waiting for interrupt */
/* note: will enter sleep before any pending interrupt(s) */



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