ATMEGA168PA-PU Atmel, ATMEGA168PA-PU Datasheet - Page 64

• Manufacturer Part Number: ATMEGA168PA-PU
• Description: MCU, 8BIT, AVR, 16K FLASH, 28PDIP
• Manufacturer: Atmel

Specifications of ATMEGA168PA-PU

• Controller Family/series: Atmega
• No. Of I/o's: 23
• Eeprom Memory Size: 512Byte
• Ram Memory Size: 1KB
• Cpu Speed: 20MHz
• No.: RoHS Compliant
• Core Size: 8bit
• Program Memory Size: 16KB
• Oscillator Type: External, Internal
• Rohs Compliant: Yes

8271C–AVR–08/10
Table 11-5 on page 64
tions of 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 11-5.
Note:
The most typical and general program setup for the Reset and Interrupt Vector Addresses in
ATmega168A/168PA is:
ATmega48A/48PA/88A/88PA/168A/168PA/328/328
BOOTRST
Address Labels Code
0x0000
0x0002
0x0004
0x0006
0x0008
0x000A
0x000C
0x000E
0x0010
0x0012
0x0014
0x0016
0x0018
0x001A
0x001C
0x001E
0x0020
0x0022
0x0024
0x0026
0x0028
0x002A
0x002C
0x002E
0x0030
0x0032
;
0x0033RESET:
1
1
0
0
1. The Boot Reset Address is shown in
means unprogrammed while “0” means programmed.
Reset and Interrupt Vectors Placement in ATmega168A and ATmega168PA
IVSEL
0
1
0
1
jmp
jmp
jmp
jmp
jmp
jmp
jmp
jmp
jmp
jmp
jmp
jmp
jmp
jmp
jmp
jmp
jmp
jmp
jmp
jmp
jmp
jmp
jmp
jmp
jmp
jmp
ldi
shows reset and Interrupt Vectors placement for the various combina-
Reset Address
0x000
0x000
Boot Reset Address
Boot Reset Address
RESET
EXT_INT0
EXT_INT1
PCINT0
PCINT1
PCINT2
WDT
TIM2_COMPA
TIM2_COMPB
TIM2_OVF
TIM1_CAPT
TIM1_COMPA
TIM1_COMPB
TIM1_OVF
TIM0_COMPA
TIM0_COMPB
TIM0_OVF
SPI_STC
USART_RXC
USART_UDRE
USART_TXC
ADC
EE_RDY
ANA_COMP
TWI
SPM_RDY
r16, high(RAMEND); Main program start
Table 26-7 on page
Comments
; Reset Handler
; IRQ0 Handler
; IRQ1 Handler
; PCINT0 Handler
; PCINT1 Handler
; PCINT2 Handler
; Watchdog Timer Handler
; Timer2 Compare A Handler
; Timer2 Compare B Handler
; Timer2 Overflow Handler
; Timer1 Capture Handler
; Timer1 Compare A Handler
; Timer1 Compare B Handler
; Timer1 Overflow Handler
; Timer0 Compare A Handler
; Timer0 Compare B Handler
; Timer0 Overflow Handler
; SPI Transfer Complete Handler
; USART, RX Complete Handler
; USART, UDR Empty Handler
; USART, TX Complete Handler
; ADC Conversion Complete Handler
; EEPROM Ready Handler
; Analog Comparator Handler
; 2-wire Serial Interface Handler
; Store Program Memory Ready Handler
Interrupt Vectors Start Address
0x002
Boot Reset Address + 0x0002
0x002
Boot Reset Address + 0x0002
291. For the BOOTRST Fuse “1”
(1)
64