ATMEGA645A-MUR Atmel, ATMEGA645A-MUR Datasheet - Page 58

• Manufacturer Part Number: ATMEGA645A-MUR
• Description: IC MCU AVR 64K FLASH 64QFN
• Manufacturer: Atmel
• Series: AVR® ATmegar

Specifications of ATMEGA645A-MUR

• Core Processor: AVR
• Core Size: 8-Bit
• Speed: 16MHz
• Connectivity: SPI, UART/USART, USI
• Peripherals: Brown-out Detect/Reset, POR, PWM, WDT
• Number Of I /o: 54
• Program Memory Size: 64KB (32K x 16)
• Program Memory Type: FLASH
• Eeprom Size: 2K x 8
• Ram Size: 4K x 8
• Voltage - Supply (vcc/vdd): 1.8 V ~ 5.5 V
• Data Converters: A/D 8x10b
• Oscillator Type: Internal
• Operating Temperature: -40°C ~ 85°C
• Package / Case: 64-TQFP Exposed Pad
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

58
ATmega165A/165PA/325A/325PA/3250A/3250PA/645A/645P/645
The most typical and general program setup for the Reset and Interrupt Vector Addresses in
ATmega325A/325PA/3250A/3250PA/625A/645P/6450A/6450P is:
When the BOOTRST Fuse is unprogrammed, the Boot section size set to 4K bytes and the
IVSEL bit in the MCUCR Register is set before any interrupts are enabled, the most typical and
general program setup for the Reset and Interrupt Vector Addresses is:
;
0x1C2E
0x1C2F
0x1C30
0x1C31
0x1C32
0x1C33
Address
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
0x0033
0x0034
0x0035
0x0036
0x0037
RESET: ldi
Labels
RESET:
...
out
ldi
out
sei
<instr>
Code
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
out
ldi
out
sei
<inst
r>
...
r16,high(RAMEND); Main program start
SPH,r16
r16,low(RAMEND)
SPL,r16
xxx
RESET
EXT_INT0
PCINT0
PCINT1
TIM2_COMP
TIM2_OVF
TIM1_CAPT
TIM1_COMPA
TIM1_COMPB
TIM1_OVF
TIM0_COMP
TIM0_OVF
SPI_STC
USART_RXC
USART_UDRE
USART_TXC
USI_STRT
USI_OVF
ANA_COMP
ADC
EE_RDY
SPM_RDY
NOT_USED
PCINT2
PCINT3
r16, high(RAMEND)
SPH,r16
r16, low(RAMEND)
SPL,r16
xxx
...
; Set Stack Pointer to top of RAM
; Enable interrupts
Comments
; Reset Handler
; IRQ0 Handler
; PCINT0 Handler
; PCINT1 Handler
; Timer2 Compare Handler
; Timer2 Overflow Handler
; Timer1 Capture Handler
; Timer1 CompareA Handler
; Timer1 CompareB Handler
; Timer1 Overflow Handler
; Timer0 Compare Handler
; Timer0 Overflow Handler
; SPI Transfer Complete Handler
; USART0 RX Complete Handler
; USART0,UDR0 Empty Handler
; USART0 TX Complete Handler
; USI Start Condition Handler
; USI Overflow Handler
; Analog Comparator Handler
; ADC Conversion Complete Handler
; EEPROM Ready Handler
; SPM Ready Handler
; RESERVED
; PCINT2 Handler
; PCINT3 Handler
; Main program start
; Set Stack Pointer to top of RAM
; Enable interrupts
8285B–AVR–03/11