ATMEGA3290PV-10AUR Atmel, ATMEGA3290PV-10AUR Datasheet - Page 47

• Manufacturer Part Number: ATMEGA3290PV-10AUR
• Description: MCU AVR 32K FLASH 10MHZ 64TQFP
• Manufacturer: Atmel
• Series: AVR® ATmegar

Specifications of ATMEGA3290PV-10AUR

• Core Processor: AVR
• Core Size: 8-Bit
• Speed: 10MHz
• Connectivity: SPI, UART/USART, USI
• Peripherals: Brown-out Detect/Reset, LCD, POR, PWM, WDT
• Number Of I /o: 69
• Program Memory Size: 32KB (16K x 16)
• Program Memory Type: FLASH
• Eeprom Size: 1K x 8
• Ram Size: 2K 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: *
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

10.2.3
10.2.4
8021G–AVR–03/11
Brown-out Detection
Watchdog Reset
ATmega329P/3290P has an On-chip Brown-out Detection (BOD) circuit for monitoring the V
level during operation by comparing it to a fixed trigger level. The trigger level for the BOD can
be selected by the BODLEVEL Fuses. The trigger level has a hysteresis to ensure spike free
Brown-out Detection. The hysteresis on the detection level should be interpreted as V
V
value below the trigger level (V
vated. When V
starts the MCU after the Time-out period t
The BOD circuit will only detect a drop in V
ger than t
Figure 10-5. Brown-out Reset During Operation
When the Watchdog times out, it will generate a short reset pulse of one CK cycle duration. On
the falling edge of this pulse, the delay timer starts counting the Time-out period t
page 48
Figure 10-6. Watchdog Reset During Operation
BOT
+ V
for details on operation of the Watchdog Timer.
HYST
BOD
CC
/2 and V
given in
INTERNAL
TIME-OUT
CC
RESET
RESET
increases above the trigger level (V
V
CC
BOT-
”System and Reset Characteristics” on page
= V
BOT
BOT-
- V
HYST
in
V
CK
BOT-
Figure
/2.When the BOD is enabled, and V
TOUT
CC
if the voltage stays below the trigger level for lon-
has expired.
10-5), the Brown-out Reset is immediately acti-
BOT+
ATmega329P/3290P
in
V
t
TOUT
BOT+
Figure
336.
10-5), the delay counter
CC
decreases to a
TOUT
. Refer to
BOT+
47
CC
=