ATmega16A Atmel Corporation, ATmega16A Datasheet - Page 44

• Manufacturer Part Number: ATmega16A
• Manufacturer: Atmel Corporation

Specifications of ATmega16A

• Flash (kbytes): 16 Kbytes
• Pin Count: 44
• Max. Operating Frequency: 16 MHz
• Cpu: 8-bit AVR
• # Of Touch Channels: 16
• Hardware Qtouch Acquisition: No
• Max I/o Pins: 32
• Ext Interrupts: 3
• Usb Speed: No
• Usb Interface: No
• Spi: 1
• Twi (i2c): 1
• Uart: 1
• Graphic Lcd: No
• Video Decoder: No
• Camera Interface: No
• Adc Channels: 8
• Adc Resolution (bits): 10
• Adc Speed (ksps): 15
• Analog Comparators: 1
• Resistive Touch Screen: No
• Temp. Sensor: No
• Crypto Engine: No
• Sram (kbytes): 1
• Eeprom (bytes): 512
• Self Program Memory: YES
• Dram Memory: No
• Nand Interface: No
• Picopower: No
• Temp. Range (deg C): -40 to 85
• I/o Supply Class: 2.7 to 5.5
• Operating Voltage (vcc): 2.7 to 5.5
• Fpu: No
• Mpu / Mmu: no / no
• Timers: 3
• Output Compare Channels: 4
• Input Capture Channels: 1
• Pwm Channels: 4
• 32khz Rtc: Yes
• Calibrated Rc Oscillator: Yes

11. Interrupts
11.1
11.2
44
Overview
Interrupt Vectors
ATmega16A
This section describes the specifics of the interrupt handling as performed in ATmega16A. For a
general explanation of the AVR interrupt handling, refer to
page
Table 11-1.
Notes:
Table 11-2
BOOTRST and IVSEL settings. If the program never enables an interrupt source, the Interrupt
Vectors are not used, and regular program code can be placed at these locations. This is also
Vector No.
14.
10
11
12
13
14
15
16
17
18
19
20
21
1
2
3
4
5
6
7
8
9
1. When the BOOTRST Fuse is programmed, the device will jump to the Boot Loader address at
2. When the IVSEL bit in GICR is set, interrupt vectors will be moved to the start of the Boot
reset, see
Flash section. The address of each Interrupt Vector will then be the address in this table added
to the start address of the Boot Flash section.
shows Reset and Interrupt Vectors placement for the various combinations of
Reset and Interrupt Vectors
Address
Program
$000
$00A
$00C
$00E
$01A
$01C
$01E
$002
$004
$006
$008
$010
$012
$014
$016
$018
$020
$022
$024
$026
$028
“Boot Loader Support – Read-While-Write Self-Programming” on page
(1)
(2)
TIMER1 COMPB
TIMER1 COMPA
TIMER2 COMP
TIMER0 COMP
TIMER1 CAPT
USART, UDRE
TIMER2 OVF
TIMER1 OVF
TIMER0 OVF
USART, RXC
USART, TXC
ANA_COMP
SPM_RDY
SPI, STC
EE_RDY
Source
RESET
INT0
INT1
INT2
ADC
TWI
Interrupt Definition
External Pin, Power-on Reset, Brown-out Reset,
Watchdog Reset, and JTAG AVR Reset
External Interrupt Request 0
External Interrupt Request 1
Timer/Counter2 Compare Match
Timer/Counter2 Overflow
Timer/Counter1 Capture Event
Timer/Counter1 Compare Match A
Timer/Counter1 Compare Match B
Timer/Counter1 Overflow
Timer/Counter0 Overflow
Serial Transfer Complete
USART, Rx Complete
USART Data Register Empty
USART, Tx Complete
ADC Conversion Complete
EEPROM Ready
Analog Comparator
Two-wire Serial Interface
External Interrupt Request 2
Timer/Counter0 Compare Match
Store Program Memory Ready
“Reset and Interrupt Handling” on
8154B–AVR–07/09
250.