
49
8246B–AVR–09/11
ATtiny2313A/4313
The most typical and general setup for the Interrupt Vector Addresses in ATtiny2313A/4313
shown below:
Address
Labels Code
Comments
0x0000
rjmp
RESET
; Reset Handler
0x0001
rjmp
INT0
; External Interrupt0 Handler
0x0002
rjmp
INT1
; External Interrupt1 Handler
0x0003
rjmp
TIM1_CAPT
; Timer1 Capture Handler
0x0004
rjmp
TIM1_COMPA
; Timer1 CompareA Handler
0x0005
rjmp
TIM1_OVF
; Timer1 Overflow Handler
0x0006
rjmp
TIM0_OVF
; Timer0 Overflow Handler
0x0007
rjmp
USART0_RXC
; USART0 RX Complete Handler
0x0008
rjmp
USART0_DRE
; USART0,UDR Empty Handler
0x0009
rjmp
USART0_TXC
; USART0 TX Complete Handler
0x000A
rjmp
ANA_COMP
; Analog Comparator Handler
0x000B
rjmp
PCINT0
; PCINT0 Handler
0x000C
rjmp
TIMER1_COMPB
; Timer1 Compare B Handler
0x000D
rjmp
TIMER0_COMPA
; Timer0 Compare A Handler
0x000E
rjmp
TIMER0_COMPB
; Timer0 Compare B Handler
0x000F
rjmp
USI_START
; USI Start Handler
0x0010
rjmp
USI_OVERFLOW
; USI Overflow Handler
0x0011
rjmp
EE_READY
; EEPROM Ready Handler
0x0012
rjmp
WDT_OVERFLOW
; Watchdog Overflow Handler
0x0013
rjmp
PCINT1
; PCINT1 Handler
0x0014
rjmp
PCINT2
; PCINT2 Handler
;
0x0013
RESET: ldi
r16, low(RAMEND); Main program start
0x0014
out
SPL,r16
Set Stack Pointer to top of RAM
0x0015
sei
; Enable interrupts
0x0016
<instr>
xxx
...
9.2
External Interrupts
External Interrupts are triggered by the INT0 or INT1 pin or any of the PCINT17..0 pins. Observe
that, if enabled, the interrupts will trigger even if the INT0, INT1 or PCINT17..0 pins are config-
ured as outputs. This feature provides a way of generating a software interrupt. Pin change 0
interrupts PCI0 will trigger if any enabled PCINT7..0 pin toggles. Pin change 1 interrupts PCI1
will trigger if any enabled PCINT10..8 pin toggles. Pin change 2 interrupts PCI2 will trigger, if any
enabled PCINT17..11 pin toggles. The PCMSK0, PCMSK1, and PCMSK2 Registers control
which pins contribute to the pin change interrupts. Pin change interrupts on PCINT17..0 are
detected asynchronously, which means that these interrupts can be used for waking the part
also from sleep modes other than Idle mode.
The INT0 and INT1 interrupts can be triggered by a falling or rising edge or a low level. This is
rupt is enabled and configured as level triggered, the interrupt will trigger as long as the pin is
held low. Note that recognition of falling or rising edge interrupts on INT0 or INT1 requires the