ATtiny261A datasheet(49/292 Pages) ATMEL

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8197A–AVR–10/09

ATtiny261A/461A/861A

Address

Labels Code

Comments

0x0000

rjmp

RESET

; Reset Handler

0x0001

rjmp

EXT_INT0

; IRQ0 Handler

0x0002

rjmp

PCINT

; PCINT Handler

0x0003

rjmp

TIM1_COMPA

; Timer1 CompareA Handler

0x0004

rjmp

TIM1_COMPB

; Timer1 CompareB Handler

0x0005

rjmp

TIM1_OVF

; Timer1 Overflow Handler

0x0006

rjmp

TIM0_OVF

; Timer0 Overflow Handler

0x0007

rjmp

USI_START

; USI Start Handler

0x0008

rjmp

USI_OVF

; USI Overflow Handler

0x0009

rjmp

EE_RDY

; EEPROM Ready Handler

0x000A

rjmp

ANA_COMP

; Analog Comparator Handler

0x000B

rjmp

ADC

; ADC Conversion Handler

0x000C

rjmp

WDT

; WDT Interrupt Handler

0x000D

rjmp

EXT_INT1

; IRQ1 Handler

0x000E

rjmp

TIM0_COMPA

; Timer0 CompareA Handler

0x000F

rjmp

TIM0_COMPB

; Timer0 CompareB Handler

0x0010

rjmp

TIM0_CAPT

; Timer0 Capture Event Handler

0x0011

rjmp

TIM1_COMPD

; Timer1 CompareD Handler

0x0012

rjmp

FAULT_PROTECTION ; Timer1 Fault Protection

0x0013

RESET: ldi

r16, low(RAMEND) ; Main program start

0x0014

ldi

r17, high(RAMEND); Tiny861 have also SPH

0x0015

out

SPL, r16

; Set Stack Pointer to top of RAM

0x0016

out

SPH, r17

; Tiny861 have also SPH

0x0017

sei

; Enable interrupts

0x0018

<instr>

...

9.2

External Interrupts

The External Interrupts are triggered by the INT0 or INT1 pin or any of the PCINT15:0 pins.

Observe that, if enabled, the interrupts will trigger even if the INT0, INT1 or PCINT15:0 pins are

configured as outputs. This feature provides a way of generating a software interrupt. Pin

change interrupts PCI will trigger if any enabled PCINT15:0 pin toggles. The PCMSK Register

control which pins contribute to the pin change interrupts. Pin change interrupts on PCINT15:0

are detected asynchronously. This implies 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

set up as indicated in the specification for the MCU Control Register – MCUCR. When the INT0

interrupt is enabled and is 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 presence of an I/O clock, described in “Clock Subsystems” on page 24.

ATtiny261A Scheda tecnica(PDF) 49 Page - ATMEL Corporation

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