ATMEGA649A-AU Atmel, ATMEGA649A-AU Datasheet - Page 27

IC MCU AVR 64K FLASH 64TQFP

ATMEGA649A-AU

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

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

Available stocks

Company
Part Number
Manufacturer
Quantity
Price
Part Number:
ATMEGA649A-AU
Manufacturer:
Atmel
Quantity:
10 000
Part Number:
ATMEGA649A-AUR
Manufacturer:
Atmel
Quantity:
10 000
7.6
7.6.1
7.6.2
8284A–AVR–10/10
Register Description
EEARH and EEARL – EEPROM Address Register ATmega169A/169PA
EEARH and EEARL – EEPROM Address Register
ATmega329A/329PA/3290A/3290PA/649A/649P/6490A/6490P
• Bits 15:9 – Reserved
These bits are reserved and will always be read as zero.
• Bits 8:0 – EEAR8:0: EEPROM Address
The EEPROM Address Registers – EEARH and EEARL specify the EEPROM address in the
512 bytes EEPROM space. The EEPROM data bytes are addressed linearly between 0 and
511. The initial value of EEAR is undefined. A proper value must be written before the EEPROM
may be accessed.
• Bits 15:11 – Reserved
These bits are reserved bits in the
ATmega329A/329PA/3290A/3290PA/649A/649P/6490A/6490P and will always read as zero.
• Bits 10:0 – EEAR10:0: EEPROM Address
The EEPROM Address Registers – EEARH and EEARL specify the EEPROM address in the
1/2K bytes EEPROM space. The EEPROM data bytes are addressed linearly between 0 and
1023/2047. The initial value of EEAR is undefined. A proper value must be written before the
EEPROM may be accessed.
Note:
Bit
0x22 (0x42)
0x21 (0x41)
Read/Write
Initial Value
Bit
0x22 (0x42)
0x21 (0x41)
Read/Write
Initial Value
ATmega169A/169PA/329A/329PA/649A/649P/3290A/3290PA/6490A/6490P
1. EEAR10 is only valid for ATmega649A/649P/6490A/6490P.
EEAR7
EEAR7
R/W
R/W
15
R
0
X
7
15
R
X
7
0
EEAR6
EEAR6
R/W
14
R
X
R/W
6
0
14
R
X
6
0
EEAR5
R/W
EEAR5
13
R
X
5
0
R/W
13
R
X
5
0
EEAR4
R/W
12
R
4
0
X
EEAR4
R/W
12
R
X
4
0
EEAR3
R/W
11
R
X
3
0
EEAR3
R/W
11
R
3
0
X
EEAR10
EEAR2
R/W
R/W
10
X
X
2
EEAR2
R/W
(1)
10
R
X
2
0
EEAR9
EEAR1
R/W
R/W
9
1
X
X
EEAR1
R/W
R
X
9
1
0
EEAR8
EEAR0
R/W
R/W
EEAR8
EEAR0
8
0
X
X
R/W
R/W
X
X
8
0
EEARH
EEARL
EEARH
EEARL
27

Related parts for ATMEGA649A-AU