ATMEGA644P-A15MZ Atmel, ATMEGA644P-A15MZ Datasheet - Page 332

• Manufacturer Part Number: ATMEGA644P-A15MZ
• Description: MCU AVR 64KB FLASH 16MHZ 44QFN
• Manufacturer: Atmel
• Series: AVR® ATmegar

Specifications of ATMEGA644P-A15MZ

• Package / Case: 44-VQFN Exposed Pad
• Voltage - Supply (vcc/vdd): 2.7 V ~ 5.5 V
• Operating Temperature: -40°C ~ 125°C
• Speed: 16MHz
• Number Of I /o: 32
• Eeprom Size: 2K x 8
• Core Processor: AVR
• Program Memory Type: FLASH
• Ram Size: 4K x 8
• Program Memory Size: 64KB (64K x 8)
• Data Converters: A/D 8x10b
• Oscillator Type: Internal
• Peripherals: Brown-out Detect/Reset, POR, PWM, WDT
• Connectivity: I²C, SPI, UART/USART
• Core Size: 8-Bit
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

26.4
Table 26-4.
Notes:
Table 26-5.
Note:
332
Symbol
V
t
t
V
t
I
RST
BOD
RAM
V
BG
BG
HYST
BG
(1)
(1)
(1)
(1)
System and Reset Characteristics
1. Values indicated represent typical data from design simulation.
2. The Power-on Reset will not work unless the supply voltage has been below V
3. This is the limit to which VDD can be lowered without losing RAM data.
1. V
(3)
ATmega164P/324P/644P
tested down to V
a voltage where correct operation of the microcontroller is no longer guaranteed.
BODLEVEL 2:0 Fuses
BOT
Reset, Brown-out and Internal Voltage Reference Characteristics
BODLEVEL Fuse Coding
Parameter
Minimum pulse width on RESET Pin
Brown-out Detector Hysteresis
RAM Retention Voltage
Min Pulse Width on Brown-out Reset
Bandgap reference voltage
Bandgap reference start-up time
Bandgap reference current consumption
may be below nominal minimum operating voltage for some devices. For devices where this is the case, the device is
111
110
101
100
011
010
001
000
CC
= V
BOT
during the production test. This guarantees that a Brown-Out Reset will occur before V
(1)
(1)
Min V
2.5
4.1
BOT
V
V
V
C C
C C
C C
= 2.7V, T
= 2.7V, T
= 2.7V, T
Condition
Typ V
Reserved
Reserved
A
A
A
= 25 C
= 25 C
= 25 C
2.7
4.3
BOD Disabled
BOT
POT
(falling)
Min
1.0
Max V
Typ
1.1
50
50
40
10
2.9
4.5
2
BOT
Max
2.5
1.2
70
7674F–AVR–09/09
CC
Units
Units
drops to
V
mV
mV
µA
ns
ns
µs
V