ATmega32U4 Atmel Corporation, ATmega32U4 Datasheet - Page 62

• Manufacturer Part Number: ATmega32U4
• Manufacturer: Atmel Corporation

Specifications of ATmega32U4

• Flash (kbytes): 32 Kbytes
• Pin Count: 44
• Max. Operating Frequency: 16 MHz
• Cpu: 8-bit AVR
• # Of Touch Channels: 14
• Hardware Qtouch Acquisition: No
• Max I/o Pins: 26
• Ext Interrupts: 13
• Usb Transceiver: 1
• Usb Speed: Full Speed
• Usb Interface: Device
• Spi: 2
• Twi (i2c): 1
• Uart: 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): 3.3
• Eeprom (bytes): 1024
• 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: 4
• Output Compare Channels: 12
• Input Capture Channels: 2
• Pwm Channels: 8
• 32khz Rtc: No
• Calibrated Rc Oscillator: Yes

9.1.1
7766F–AVR–11/10
Moving Interrupts Between Application and Boot Space
Table 9-1.
Notes:
Table 9-2
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
the case if the Reset Vector is in the Application section while the Interrupt Vectors are in the
Boot section or vice versa.
Table 9-2.
Note:
The General Interrupt Control Register controls the placement of the Interrupt Vector table.
Vector
BOOTRST
No.
30
31
32
33
34
35
36
37
38
39
40
41
42
43
1
1
0
0
1. When the BOOTRST Fuse is programmed, the device will jump to the Boot Loader address at
2. When the IVSEL bit in MCUCR is set, Interrupt Vectors will be moved to the start of the Boot
1. The Boot Reset Address is shown in
Address
Program
shows reset and Interrupt Vectors placement for the various combinations of
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.
means unprogrammed while “0” means programmed.
$003A
$003C
$004C
$004E
$003E
$0040
$0042
$0044
$0046
$0048
$004A
$0050
$0052
$0054
Reset and Interrupt Vectors (Continued)
Reset and Interrupt Vectors Placement
IVSEL
(2)
0
1
0
1
“Memory Programming” on page
Source
ADC
EE READY
TIMER3 CAPT
TIMER3 COMPA
TIMER3 COMPB
TIMER3 COMPC
TIMER3 OVF
TWI
SPM READY
TIMER4 COMPA
TIMER4 COMPB
TIMER4 COMPD
TIMER4 OVF
TIMER4 FPF
Reset Address
0x0000
0x0000
Boot Reset Address
Boot Reset Address
Interrupt Definition
ADC Conversion Complete
EEPROM Ready
Timer/Counter3 Capture Event
Timer/Counter3 Compare Match A
Timer/Counter3 Compare Match B
Timer/Counter3 Compare Match C
Timer/Counter3 Overflow
2-wire Serial Interface
Store Program Memory Ready
Timer/Counter4 Compare Match A
Timer/Counter4 Compare Match B
Timer/Counter4 Compare Match D
Timer/Counter4 Overflow
Timer/Counter4
Table 27-8 on page
Interrupt Vectors Start Address
0x0002
Boot Reset Address + 0x0002
0x0002
Boot Reset Address + 0x0002
346.
(1)
Fault Protection Interrupt
344. For the BOOTRST Fuse “1”
ATmega16/32U4
62