ATtiny40 Atmel Corporation, ATtiny40 Datasheet - Page 40

• Manufacturer Part Number: ATtiny40
• Manufacturer: Atmel Corporation

Specifications of ATtiny40

• Flash (kbytes): 4 Kbytes
• Pin Count: 20
• Max. Operating Frequency: 12 MHz
• Cpu: 8-bit AVR
• # Of Touch Channels: 12
• Hardware Qtouch Acquisition: Yes
• Max I/o Pins: 18
• Ext Interrupts: 18
• Usb Speed: No
• Usb Interface: No
• Spi: 1
• Twi (i2c): 1
• Graphic Lcd: No
• Video Decoder: No
• Camera Interface: No
• Adc Channels: 12
• Adc Resolution (bits): 10
• Adc Speed (ksps): 15
• Analog Comparators: 1
• Resistive Touch Screen: No
• Temp. Sensor: Yes
• Crypto Engine: No
• Sram (kbytes): 0.25
• Self Program Memory: NO
• Dram Memory: No
• Nand Interface: No
• Picopower: No
• Temp. Range (deg C): -40 to 85
• I/o Supply Class: 1.8 to 5.5
• Operating Voltage (vcc): 1.8 to 5.5
• Fpu: No
• Mpu / Mmu: no / no
• Timers: 2
• Output Compare Channels: 4
• Input Capture Channels: 1
• Pwm Channels: 2
• 32khz Rtc: No
• Calibrated Rc Oscillator: Yes

9. Interrupts
9.1
40
Interrupt Vectors
ATtiny40
This section describes the specifics of the interrupt handling as performed in ATtiny40. For a
general explanation of the AVR interrupt handling, see
11.
The interrupt vectors of ATtiny40 are described in
Table 9-1.
1.
In case the program never enables an interrupt source, the Interrupt Vectors will not be used
and, consequently, regular program code can be placed at these locations.
The most typical and general setup for interrupt vector addresses in ATtiny40 is shown in the
program example below.
Vector No.
Address Labels Code
0x0000
0x0001
0x0002
10
11
12
13
14
15
16
17
18
1
2
3
4
5
6
7
8
9
The touch sensing interrupt source is related to the QTouch library support.
Reset and Interrupt Vectors
Program Address
0x000A
0x000B
0x000C
0x000D
0x000E
0x0000
0x0001
0x0002
0x0003
0x0004
0x0005
0x0006
0x0007
0x0008
0x0009
0x000F
0x0010
0x0011
rjmp
rjmp
rjmp
RESET
INT0
PCINT0
Label
RESET
INT0
PCINT0
PCINT1
PCINT2
WDT
TIM1_CAPT
TIM1_COMPA
TIM1_COMPB
TIM1_OVF
TIM0_COMPA
TIM0_COMPB
TIM0_OVF
ANA_COMP
ADC
TWI_SLAVE
SPI
QTRIP
(1)
Comments
; Reset Handler
; IRQ0 Handler
; PCINT0 Handler
Table 9-1
“Reset and Interrupt Handling” on page
Interrupt Source
External Pin, Power-on Reset,
Brown-Out Reset, Watchdog Reset
External Interrupt Request 0
Pin Change Interrupt Request 0
Pin Change Interrupt Request 1
Pin Change Interrupt Request 2
Watchdog Time-out
Timer/Counter1 Input Capture
Timer/Counter1 Compare Match A
Timer/Counter1 Compare Match B
Timer/Counter1 Overflow
Timer/Counter0 Compare Match A
Timer/Counter0 Compare Match B
Timer/Counter0 Overflow
Analog Comparator
ADC Conversion Complete
Two-Wire Interface
Serial Peripheral Interface
Touch Sensing
below.
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