at90pwm81-16se ATMEL Corporation, at90pwm81-16se Datasheet - Page 83
at90pwm81-16se
Manufacturer Part Number
at90pwm81-16se
Description
8-bit Avr Microcontroller With 8k Bytes In- System Programmable Flash
Manufacturer
ATMEL Corporation
Datasheet
1.AT90PWM81-16SE.pdf
(323 pages)
- Current page: 83 of 323
- Download datasheet (6Mb)
11.0.2
11.0.3
7734M–AVR–03/10
External Interrupt Mask Register – EIMSK
External Interrupt Flag Register – EIFR
Note:
• Bits 2..0 – INT2 – INT0: External Interrupt Request 3 - 0 Enable
When an INT2 – INT0 bit is written to one and the I-bit in the Status Register (SREG) is set (one), the cor-
responding external pin interrupt is enabled. The Interrupt Sense Control bits in the External Interrupt
Control Register – EICRA – defines whether the external interrupt is activated on rising or falling edge or
level sensed. Activity on any of these pins will trigger an interrupt request even if the pin is enabled as an
output. This provides a way of generating a software interrupt.
• Bits 2..0 – INTF2 - INTF0: External Interrupt Flags 3 - 0
When an edge or logic change on the INT2:0 pin triggers an interrupt request, INTF2:0 becomes set (one).
If the I-bit in SREG and the corresponding interrupt enable bit, INT2:0 in EIMSK, are set (one), the MCU
will jump to the interrupt vector. The flag is cleared when the interrupt routine is executed. Alternatively,
the flag can be cleared by writing a logical one to it. These flags are always cleared when INT2:0 are con-
figured as level interrupt.
Bit
Read/Write
Initial Value
Bit
Read/Write
Initial Value
1. n = 3, 2, 1 or 0.
When changing the ISCn1/ISCn0 bits, the interrupt must be disabled by clearing its Interrupt Enable bit
in the EIMSK Register. Otherwise an interrupt can occur when the bits are changed.
7
-
R/W
0
7
-
R/W
0
6
-
R/W
0
6
-
R/W
0
5
-
R/W
0
5
-
R/W
0
4
-
R/W
0
4
-
R/W
0
3
-
R/W
0
3
-
R/W
0
2
INT2
R/W
0
2
INTF2
R/W
0
1
INT1
R/W
0
1
INTF1
R/W
0
AT90PWM81
0
IINT0
R/W
0
0
IINTF0
R/W
0
EIMSK
EIFR
83
Related parts for at90pwm81-16se
Image
Part Number
Description
Manufacturer
Datasheet
Request
R
Part Number:
Description:
Manufacturer:
Atmel Corporation
Datasheet:
Part Number:
Description:
INTERVAL AND WIPE/WASH WIPER CONTROL IC WITH DELAY
Manufacturer:
ATMEL Corporation
Datasheet:
Part Number:
Description:
Low-Voltage Voice-Switched IC for Hands-Free Operation
Manufacturer:
ATMEL Corporation
Datasheet:
Part Number:
Description:
MONOLITHIC INTEGRATED FEATUREPHONE CIRCUIT
Manufacturer:
ATMEL Corporation
Datasheet:
Part Number:
Description:
AM-FM Receiver IC U4255BM-M
Manufacturer:
ATMEL Corporation
Datasheet:
Part Number:
Description:
Monolithic Integrated Feature Phone Circuit
Manufacturer:
ATMEL Corporation
Datasheet:
Part Number:
Description:
Multistandard Video-IF and Quasi Parallel Sound Processing
Manufacturer:
ATMEL Corporation
Datasheet:
Part Number:
Description:
High-performance EE PLD
Manufacturer:
ATMEL Corporation
Datasheet:
Part Number:
Description:
8-bit Flash Microcontroller
Manufacturer:
ATMEL Corporation
Datasheet:
Part Number:
Description:
2-Wire Serial EEPROM
Manufacturer:
ATMEL Corporation
Datasheet: