ATMEGA649A-AU Atmel, ATMEGA649A-AU Datasheet - Page 306

• Manufacturer Part Number: ATMEGA649A-AU
• Description: IC MCU AVR 64K FLASH 64TQFP
• Manufacturer: Atmel
• Series: AVR® ATmegar

Specifications of ATMEGA649A-AU

• Core Processor: AVR
• Core Size: 8-Bit
• Speed: 16MHz
• Connectivity: SPI, UART/USART, USI
• Peripherals: Brown-out Detect/Reset, LCD, 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
• Processor Series: ATmega
• Core: AVR
• Data Bus Width: 8 bit
• Data Ram Size: 4 KB
• Interface Type: SPI, USART
• Maximum Clock Frequency: 16 MHz
• Number Of Programmable I/os: 54
• Number Of Timers: 3
• Operating Supply Voltage: 3.3 V
• Maximum Operating Temperature: + 85 C
• Mounting Style: SMD/SMT
• Minimum Operating Temperature: - 40 C
• Operating Temperature Range: - 40 C to + 85 C
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

26.8.13
26.8.13.1
8284A–AVR–10/10
Boot Loader Parameters
ATmega169A/169PA
In
description of the Self-Programming are given.
Table 26-6.
Note:
ATmega169A/169PA/329A/329PA/649A/649P/3290A/3290PA/6490A/6490P
Table 26-9 on page 307
1
1
0
0
Return:
Do_spm:
Wait_spm:
Wait_ee:
brne Rdloop
; return to RWW section
; verify that RWW section is safe to read
in
sbrs temp1, RWWSB
ret
; re-enable the RWW section
ldi
call Do_spm
rjmp Return
; check for previous SPM complete
in
sbrc temp1, SPMEN
rjmp Wait_spm
; input: spmcrval determines SPM action
; disable interrupts if enabled, store status
in
cli
; check that no EEPROM write access is present
sbic EECR, EEWE
rjmp Wait_ee
; SPM timed sequence
out
spm
; restore SREG (to enable interrupts if originally enabled)
out
ret
1. The different BOOTSZ Fuse configurations are shown in
temp1, SPMCSR
spmcrval, (1<<RWWSRE) | (1<<SPMEN)
temp1, SPMCSR
temp2, SREG
SPMCSR, spmcrval
SREG, temp2
1
0
1
0
Boot Size Configuration (ATmega169A/169PA)
words
words
words
words
1024
128
256
512
16
2
4
8
through
; If RWWSB is set, the RWW section is not ready yet
Application Flash
Section
0x0000 - 0x1DFF
0x0000 - 0x1F7F
0x0000 - 0x1EFF
0x0000 - 0x1BFF
Table 26-11 on page
Boot Loader
Flash
Section
0x1E00 - 0x1FFF
0x1C00 - 0x1FFF
0x1F80 - 0x1FFF
0x1F00 - 0x1FFF
308, the parameters used in the
(1)
Figure 26-2
End
Application
Section
0x1EFF
0x1DFF
0x1BFF
0x1F7F
Boot Reset
Address
(Start Boot
Loader
Section)
0x1F80
0x1F00
0x1E00
0x1C00
306