Rainbow-electronics ATmega8515L Instrukcja Użytkownika Pobierz pdf (Strona 51)

ATmega8515(L)

2512A–AVR–04/02

Interrupts Thissection describes the specifics of theinterrupt handling asperformed in

ATmega8515. For ageneral explanation of the AVR interrupt handling,refer to “Reset

andInterrupt Handling” on page 11.

Interrupt Vectors in

ATmega8515

Notes: 1. When the BOOTRST Fuseisprogrammed, the device will jump to the Boot Loader

address at reset,see “Boot LoaderSupport–Read-While-Write Self-Programming”

on page 162.

2. When the IVSEL bit in GICRisset,InterruptVectors will bemoved to the startof the

Boot Flash section. Theaddress of each InterruptVectorwill then betheaddress in

this tableadded to the startaddress of the Boot Flash section.

Table23shows Reset andInterruptVectors placement for thevariouscombinations of

BOOTRSTandIVSEL settings. If the program never enables an interrupt source, the

InterruptVectors are not used, andregularprogram code can be placed at these loca-

tions.This is alsothe caseif theReset Vector is in theApplication section whilethe

InterruptVectors areinthe Boot section or viceversa.

Table 22. Reset andInterruptVectors

Vector No.

Program

Address

(2)

Source Interrupt Definition

1 $000

(1)

RESET External Pin, Power-on Reset,Brown-out

Reset andWatchdog Reset

2 $001 INT0 ExternalInterruptRequest0

3$002 INT1 ExternalInterruptRequest1

4 $003 TIMER1 CAPT Timer/Counter1 Capture Event

5 $004 TIMER1 COMPA Ti m e r/Counter1 Compare Match A

6$005 TIMER1 COMPB Timer/Counter1 Compare Match B

7$006 TIMER1 OVF Timer/Counter1 Overflow

8 $007 TIMER0 OVF Timer/Counter0 Overflow

9$008 SPI, STCSerial TransferComplete

10 $009USART, RXC USART, RxComplete

11 $00A USART,UDREUSART Data RegisterEmpty

12 $00BUSART, TXC USART, TxComplete

13$00C ANA_COMPAnalog Comparator

14 $00DINT2 ExternalInterruptRequest2

15 $00E TIMER0 COMPTimer/Counter0 Compare Match

16$00F EE_RDY E EPROM Ready

17$010 SPM_RDY S toreProgram Memory Ready

1 2 ... 46 47 48 49 50 51 52 53 54 55 56 ... 222 223

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