ATMEGA649A-AU Atmel, ATMEGA649A-AU Datasheet - Page 355

• 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

28.6.2
28.7
8284A–AVR–10/10
Brown-out Detection
ATmega329A/329PA/3290A/3290PA/649A/649P/6490A/6490PA
revision A and B
Table 28-16. Reset, Brown-out, and Internal Voltage Reference Characteristics,
Note:
Table 28-17. BODLEVEL Fuse Coding
Note:
Symbol
V
SR
ATmega169A/169PA/329A/329PA/649A/649P/3290A/3290PA/6490A/6490P
POT
ON
BODLEVEL[2:0] Fuses
1. The Power-on Reset will not work unless the supply voltage has been below V
1. V
this is the case, the device is tested down to V
antees that a Brown-Out Reset will occur before V
operation of the microcontroller is no longer guaranteed. The test is performed using
BODLEVEL = 110, 101 and 100.
BOT
Parameter
Power-on Reset Threshold Voltage (rising)
Power-on Reset Threshold Voltage (falling)
Power-on Slope Rate
T
A
111
110
101
100
011
010
001
000
may be below nominal minimum operating voltage for some devices. For devices where
= -40°C to 85°C
Min. V
(1)
1.7
2.5
4.1
BOT
(1)
CC
Typ V
= V
CC
1.8
2.7
4.3
BOT
BOD Disabled
drops to a voltage where correct
BOT
Reserved
during the production test. This guar-
Min.
0.01
0.7
0.5
Max V
Typ
1.0
0.9
2.0
2.9
4.5
BOT
Max
1.4
1.3
4.5
POT
(falling)
Units
Units
V/ms
V
V
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