ATMEGA649A-AU Atmel, ATMEGA649A-AU Datasheet - Page 354

• 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

28.5
28.6
28.6.1
8284A–AVR–10/10
System and Reset Characteristics
Power-on Reset
ATmega169A/169PA/329A/329PA/3290A/3290PA/649A/649P/6490A/6490PA
revision C and later
The following characteristics apply only to ATmega169A/169PA
Table 28-14. Reset, Brown-out, and Internal Voltage Characteristics
Note:
Table 28-15. Reset, Brown-out and Internal Voltage Reference Characteristics,
Notes:
Symbol
Symbol
ATmega169A/169PA/329A/329PA/649A/649P/3290A/3290PA/6490A/6490P
V
V
V
V
SR
t
t
V
V
t
I
RST
HYST
BOD
POT
RST
BG
BG
PSR
BG
POT
ON
1. The Power-on Reset will not work unless the supply voltage has been below V
1. The Power-on Reset will not work unless the supply voltage has been below V
Parameter
Power-on Reset Threshold
Voltage (rising)
Power-on Reset Threshold
Voltage (falling)
Power-on Reset Slope Rate
Minimum pulse width on RESET
Pin
Brown-out Detector Hysteresis
Min Pulse Width on Brown-out
Reset
Bandgap reference voltage
Bandgap reference start-up time
Bandgap reference current
consumption
RESET Pin Threshold Voltage
Parameter
Power-on Reset Threshold Voltage (rising)
Power-on Reset Threshold Voltage (falling)
Power-on Slope Rate
T
A
= -40°C to 85°C
(1)
V
V
V
Condition
T
T
T
T
T
V
V
A
A
CC
CC
CC
to 85°C
to 85°C
A
A
A
CC
CC
= -40°C
= -40°C
= 25°C
= 25°C
= 25°C
= 2.7V,
= 2.7V,
= 2.7V,
= 3V
= 3V
(1)
0.2 V
Min
1.1
0.6
0.1
1.0
CC
Min.
0.01
1.1
0.6
Typ
1.4
1.3
1.1
50
40
15
2
Typ
1.4
1.3
0.9 V
Max
1.6
1.6
2.5
1.2
4.5
70
Max
1.6
1.6
10
POT
POT
CC
(falling)
(falling)
Units
V/ms
Units
V/ms
mV
V
µA
µs
µs
µs
V
V
V
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