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ATmega8A Datasheet(PDF) 69 Page - ATMEL Corporation

Part # ATmega8A
Description  8-bit with 8K Bytes In-System Programmable Flash
Download  307 Pages
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Manufacturer  ATMEL [ATMEL Corporation]
Direct Link  http://www.atmel.com
Logo ATMEL - ATMEL Corporation

ATmega8A Datasheet(HTML) 69 Page - ATMEL Corporation

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69
8159C–AVR–07/09
ATmega8A
13.1.3
GIFR – General Interrupt Flag Register
• Bit 7 – INTF1: External Interrupt Flag 1
When an event on the INT1 pin triggers an interrupt request, INTF1 becomes set (one). If the I-
bit in SREG and the INT1 bit in GICR are set (one), the MCU will jump to the corresponding
Interrupt Vector. The flag is cleared when the interrupt routine is executed. Alternatively, the flag
can be cleared by writing a logical one to it. This flag is always cleared when INT1 is configured
as a level interrupt.
• Bit 6 – INTF0: External Interrupt Flag 0
When an event on the INT0 pin triggers an interrupt request, INTF0 becomes set (one). If the I-
bit in SREG and the INT0 bit in GICR are set (one), the MCU will jump to the corresponding
Interrupt Vector. The flag is cleared when the interrupt routine is executed. Alternatively, the flag
can be cleared by writing a logical one to it. This flag is always cleared when INT0 is configured
as a level interrupt.
Bit
7654
321
0
INTF1
INTF0
–
–
–
–
–
–GIFR
Read/Write
R/W
R/W
RRR
RRR
Initial Value
0000
000
0


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