AT90PWM81-16MF Atmel, AT90PWM81-16MF Datasheet - Page 83

• Manufacturer Part Number: AT90PWM81-16MF
• Description: IC MCU AVR 8K FLASH ISP 32QFN
• Manufacturer: Atmel
• Series: AVR® 90PWM Lightingr

Specifications of AT90PWM81-16MF

• Core Processor: AVR
• Core Size: 8-Bit
• Speed: 16MHz
• Connectivity: SPI
• Peripherals: Brown-out Detect/Reset, PWM, WDT
• Number Of I /o: 20
• Program Memory Size: 8KB (8K x 8)
• Program Memory Type: FLASH
• Eeprom Size: 512 x 8
• Ram Size: 256 x 8
• Voltage - Supply (vcc/vdd): 2.7 V ~ 5.5 V
• Data Converters: A/D 11x10b; D/A 1x10b
• Oscillator Type: Internal
• Operating Temperature: -40°C ~ 105°C
• Package / Case: 32-MLF®, QFN
• For Use With: ATSTK600-SOIC - STK600 SOCKET/ADAPTER FOR SOIC
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

10.0.2
10.0.3
7734P–AVR–08/10
External Interrupt Mask Register – EIMSK
External Interrupt Flag Register – EIFR
• 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
7
-
R/W
0
7
-
R/W
0
6
-
R/W
0
6
-
R/W
0
5
-
R/W
0
5
-
R/W
0
0
0
4
-
R/W
4
-
R/W
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