ATMEGA649A-AU Atmel, ATMEGA649A-AU Datasheet - Page 20

• 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

7. AVR Memories
7.1
8284A–AVR–10/10
In-System Reprogrammable Flash Program Memory
T h i s
ATmega169A/169PA/329A/329PA/3290A/3290PA/649A/649P/6490A/6490P. The AVR archi-
tecture has two main memory spaces, the Data Memory and the Program Memory space. In
addition, the ATmega169A/169PA/329A/329PA/3290A/3290PA/649A/649P/6490A/6490P fea-
tures an EEPROM Memory for data storage. All three memory spaces are linear.
The ATmega169A/169PA/329A/329PA/649A/649P/3290A/3290PA/6490A/6490P contains
16/32/64K bytes On-chip In-System Reprogrammable Flash memory for program storage. Since
all AVR instructions are 16 or 32 bits wide, the Flash is organized as 8K x 16
(ATmega169A/169PA) and 16/32K x 16
(ATmega329A/ATmega329PA/ATmega3290A/ATmega3290PA/ATmega649A/ATmega649P/A
Tmega6490A/ATmega6490P). For software security, the Flash Program memory space is
divided into two sections, Boot Program section and Application Program section.
The Flash memory has an endurance of at least 10,000 write/erase cycles.
The ATmega169A/169PA/329A/329PA/649A/649P/3290A/3290PA/6490A/6490P Program
Counter (PC) is 13/14/15 bits wide, thus addressing the 8/16/32K program memory locations.
The operation of Boot Program section and associated Boot Lock bits for software protection are
described in detail in
295.
downloading using the SPI pins or the JTAG interface.
Constant tables can be allocated within the entire program memory address space (see the LPM
– Load Program Memory instruction description).
Timing diagrams for instruction fetch and execution are presented in
ing” on page
Figure 7-1.
ATmega169A/169PA/329A/329PA/649A/649P/3290A/3290PA/6490A/6490P
”Memory Programming” on page 311
s e c t i o n
17.
Program Memory Map
”Boot Loader Support – Read-While-Write Self-Programming” on page
d e s c r i b e s
Application Flash Section
Boot Flash Section
Program Memory
t h e
contains a detailed description on Flash data serial
d i f f e r e n t
0x0000
0x1FFF/0x3FFF/0x7FFF
m e m o r i e s
”Instruction Execution Tim-
i n
t h e
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