ATMEGA329P_1 datasheet(59/385 Pages) ATMEL

Nome de Peças	ATMEGA329P

Descrição Electrónicos	8-bit Microcontroller with 32K Bytes In-System Programmable Flash

PDF	385 Pages

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Fabricante Electrônico	ATMEL [ATMEL Corporation]

Página de início	http://www.atmel.com

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59

8021E–AVR–07/09

ATmega329P/3290P

12.3.2

EIMSK – External Interrupt Mask Register

• Bit 7 – PCIE3: Pin Change Interrupt Enable 3

When the PCIE3 bit is set (one) and the I-bit in the Status Register (SREG) is set (one), pin

change interrupt 3 is enabled. Any change on any enabled PCINT30:24 pin will cause an inter-

rupt. The corresponding interrupt of Pin Change Interrupt Request is executed from the PCINT3

Interrupt Vector. PCINT30:24 pins are enabled individually by the PCMSK3 Register.

This bit is reserved bit in ATmega329P/649P and should always be written to zero.

• Bit 6 – PCIE2: Pin Change Interrupt Enable 2

When the PCIE2 bit is set (one) and the I-bit in the Status Register (SREG) is set (one), pin

change interrupt 2 is enabled. Any change on any enabled PCINT23:16 pin will cause an inter-

rupt. The corresponding interrupt of Pin Change Interrupt Request is executed from the PCINT2

Interrupt Vector. PCINT23:16 pins are enabled individually by the PCMSK2 Register.

This bit is reserved bit in ATmega329P/649P and should always be written to zero.

• Bit 5 – PCIE1: Pin Change Interrupt Enable 1

When the PCIE1 bit is set (one) and the I-bit in the Status Register (SREG) is set (one), pin

change interrupt 1 is enabled. Any change on any enabled PCINT15:8 pin will cause an inter-

rupt. The corresponding interrupt of Pin Change Interrupt Request is executed from the PCINT1

Interrupt Vector. PCINT15:8 pins are enabled individually by the PCMSK1 Register.

• Bit 4 – PCIE0: Pin Change Interrupt Enable 0

When the PCIE0 bit is set (one) and the I-bit in the Status Register (SREG) is set (one), pin

change interrupt 0 is enabled. Any change on any enabled PCINT7:0 pin will cause an interrupt.

The corresponding interrupt of Pin Change Interrupt Request is executed from the PCINT0 Inter-

rupt Vector. PCINT7:0 pins are enabled individually by the PCMSK0 Register.

• Bit 0 – INT0: External Interrupt Request 0 Enable

When the INT0 bit is set (one) and the I-bit in the Status Register (SREG) is set (one), the exter-

nal pin interrupt is enabled. The Interrupt Sense Control0 bits 1/0 (ISC01 and ISC00) in the

External Interrupt Control Register A (EICRA) define whether the external interrupt is activated

on rising and/or falling edge of the INT0 pin or level sensed. Activity on the pin will cause an

interrupt request even if INT0 is configured as an output. The corresponding interrupt of External

Interrupt Request 0 is executed from the INT0 Interrupt Vector.

Table 12-1.

Interrupt 0 Sense Control

ISC01

ISC00

Description

0

The low level of INT0 generates an interrupt request.

0

1

Any logical change on INT0 generates an interrupt request.

1

0

The falling edge of INT0 generates an interrupt request.

1

The rising edge of INT0 generates an interrupt request.

Bit

76543210

(0xD1)

PCIE3

PCIE2

PCIE1

PCIE0

–

–INT0

EIMSK

Read/Write

R/W

R

R/W

Initial Value

00000000

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ATMEL Corporation	ATMEGA329P	734Kb / 427P	High Performance, Low Power Atmel

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