ATmega16U4 datasheet(87/408 Pages) ATMEL

Part #	ATmega16U4

Description	8-bit Microcontroller with 16/32K Bytes of ISP Flash and USB Controller

PDF	408 Pages

Scroll/Zoom	100%

Manufacturer	ATMEL [ATMEL Corporation]

Direct Link	http://www.atmel.com

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87 / 408 page

7766D–AVR–01/09

ATmega16U4/ATmega32U4

• Bit 0 – PCIF0: Pin Change Interrupt Flag 0

When a logic change on any PCINT7..0 pin triggers an interrupt request, PCIF0 becomes set

(one). If the I-bit in SREG and the PCIE0 bit in EIMSK are set (one), the MCU will jump to the

corresponding Interrupt Vector. The flag is cleared when the interrupt routine is executed. Alter-

natively, the flag can be cleared by writing a logical one to it.

11.0.7

Pin Change Mask Register 0 – PCMSK0

• Bit 7..0 – PCINT7..0: Pin Change Enable Mask 7..0

Each PCINT7..0 bit selects whether pin change interrupt is enabled on the corresponding I/O

pin. If PCINT7..0 is set and the PCIE0 bit in PCICR is set, pin change interrupt is enabled on the

corresponding I/O pin. If PCINT7..0 is cleared, pin change interrupt on the corresponding I/O pin

is disabled.

Bit

654

PCINT7

PCINT6

PCINT5

PCINT4

PCINT3

PCINT2

PCINT1

PCINT0

PCMSK0

Read/Write

R/W

Initial Value

ATmega16U4 Datasheet(PDF) 87 Page - ATMEL Corporation