ATMEGA649A-AU Atmel, ATMEGA649A-AU Datasheet - Page 33

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
8284A–AVR–10/10
electromagnetic noise of the environment. Some initial guidelines for choosing capacitors for
use with crystals are given in
the manufacturer should be used.
Figure 8-2.
The Oscillator can operate in three different modes, each optimized for a specific frequency
range. The operating mode is selected by the fuses CKSEL3...1 as shown in
Table 8-5.
Note:
The CKSEL0 Fuse together with the SUT1...0 Fuses select the start-up times as shown in
8-6.
Table 8-6.
CKSEL0
ATmega169A/169PA/329A/329PA/649A/649P/3290A/3290PA/6490A/6490P
0
0
0
0
1
CKSEL3..1
1. This option should not be used with crystals, only with ceramic resonators.
100
101
110
111
(1)
SUT1..0
Crystal Oscillator Connections
Crystal Oscillator Operating Modes
Start-up Times for the Crystal Oscillator Clock Selection
00
01
10
11
00
Start-up Time from
Frequency Range
Power-down and
Power-save
Table
258 CK
258 CK
0.4 - 0.9
0.9 - 3.0
3.0 - 8.0
1K CK
1K CK
1K CK
(MHz)
8.0 -
8-5. For ceramic resonators, the capacitor values given by
C2
C1
(2)
(2)
(2)
(1)
(1)
Recommended Range for Capacitors C1 and
Additional Delay
14CK + 4.1 ms
14CK + 4.1 ms
14CK + 65 ms
14CK + 65 ms
(V
from Reset
CC
14CK
XTAL2
XTAL1
GND
C2 for Use with Crystals (pF)
= 5.0V)
12 - 22
12 - 22
12 - 22
Ceramic resonator, fast
rising power
Ceramic resonator,
slowly rising power
Recommended Usage
Ceramic resonator, fast
Ceramic resonator,
Ceramic resonator,
slowly rising power
Table
BOD enabled
rising power
8-5.
Table
33

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