ATMEGA64-16AI Atmel, ATMEGA64-16AI Datasheet - Page 53

• Manufacturer Part Number: ATMEGA64-16AI
• Description: IC AVR MCU 64K 16MHZ IND 64-TQFP
• Manufacturer: Atmel
• Series: AVR® ATmegar

Specifications of ATMEGA64-16AI

• Core Processor: AVR
• Core Size: 8-Bit
• Speed: 16MHz
• Connectivity: I²C, SPI, UART/USART
• Peripherals: Brown-out Detect/Reset, POR, PWM, WDT
• Number Of I /o: 53
• 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): 4.5 V ~ 5.5 V
• Data Converters: A/D 8x10b
• Oscillator Type: Internal
• Operating Temperature: -40°C ~ 85°C
• Package / Case: 64-TQFP, 64-VQFP
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant

Power-on Reset
2490Q–AVR–06/10
A Power-on Reset (POR) pulse is generated by an On-chip Detection circuit. The detection level
is defined in
POR circuit can be used to trigger the Start-up Reset, as well as to detect a failure in supply
voltage.
A Power-on Reset (POR) circuit ensures that the device is reset from Power-on. Reaching the
Power-on Reset threshold voltage invokes the delay counter, which determines how long the
device is kept in RESET after V
when V
Figure 23. MCU Start-up, RESET Tied to V
Figure 24. MCU Start-up, RESET Extended Externally
INTERNAL
INTERNAL
TIME-OUT
TIME-OUT
CC
RESET
RESET
2. V
RESET
RESET
V
V
decreases below the detection level.
CC
CC
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=1 for ATmega64L and BODLEVEL=0 for ATmega64. BODLEVEL=1 is not appli-
cable for ATmega64.
BOT
Table
may be below nominal minimum operating voltage for some devices. For devices where
19. The POR is activated whenever V
V
V
V
POT
POT
RST
CC
t
TOUT
rise. The RESET signal is activated again, without any delay,
CC
V
RST
t
TOUT
CC
= V
BOT
CC
CC
is below the detection level. The
during the production test. This guar-
drops to a voltage where correct
ATmega64(L)
53