ATMEGA406-1AAU Atmel, ATMEGA406-1AAU Datasheet - Page 42

• Manufacturer Part Number: ATMEGA406-1AAU
• Description: IC AVR MCU 40K 1MHZ 48LQFP
• Manufacturer: Atmel
• Series: AVR® ATmegar

Specifications of ATMEGA406-1AAU

• Core Processor: AVR
• Core Size: 8-Bit
• Speed: 1MHz
• Connectivity: I²C
• Peripherals: POR, WDT
• Number Of I /o: 18
• Program Memory Size: 40KB (20K x 16)
• Program Memory Type: FLASH
• Eeprom Size: 512 x 8
• Ram Size: 2K x 8
• Voltage - Supply (vcc/vdd): 4 V ~ 25 V
• Data Converters: A/D 10x12b
• Oscillator Type: Internal
• Operating Temperature: -30°C ~ 85°C
• Package / Case: 48-LQFP
• Processor Series: ATMEGA48x
• Core: AVR8
• Data Bus Width: 8 bit
• Data Ram Size: 2 KB
• Interface Type: 2-Wire
• Maximum Clock Frequency: 1 MHz
• Number Of Programmable I/os: 18
• Number Of Timers: 2
• Maximum Operating Temperature: + 85 C
• Mounting Style: SMD/SMT
• 3rd Party Development Tools: EWAVR, EWAVR-BL
• Development Tools By Supplier: ATAVRDRAGON, ATSTK500, ATSTK600, ATAVRISP2, ATAVRONEKIT
• Minimum Operating Temperature: - 30 C
• Cpu Family: ATmega
• Device Core: AVR
• Device Core Size: 8b
• Frequency (max): 1MHz
• Total Internal Ram Size: 2KB
• # I/os (max): 18
• Number Of Timers - General Purpose: 2
• Operating Supply Voltage (typ): 5/9/12/15/18/24V
• Operating Supply Voltage (max): 25V
• Operating Supply Voltage (min): 4V
• On-chip Adc: 10-chx12-bit
• Instruction Set Architecture: RISC
• Operating Temp Range: -30C to 85C
• Operating Temperature Classification: Commercial
• Mounting: Surface Mount
• Pin Count: 48
• Package Type: LQFP
• Controller Family/series: AVR MEGA
• No. Of I/o's: 18
• Eeprom Memory Size: 512Byte
• Ram Memory Size: 2KB
• Cpu Speed: 1MHz
• Rohs Compliant: Yes
• For Use With: 770-1007 - ISP 4PORT ATMEL AVR MCU SPI/JTAG770-1005 - ISP 4PORT FOR ATMEL AVR MCU JTAG770-1004 - ISP 4PORT FOR ATMEL AVR MCU SPI
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

9.2.3
9.2.4
42
ATmega406
Watchdog Reset
Brown-out Detection
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 43
Figure 9-4.
ATmega406 has an On-chip Brown-out Detection (BOD) circuit for monitoring the VREG level
during operation by comparing it to a fixed trigger level V
teresis to ensure spike free Brown-out Detection. The hysteresis on the detection level should
be interpreted as V
The BOD is automatically enabled in all modes of operation, except in Power-off mode.
When the BOD is enabled, and VREG decreases to a value below the trigger level (V
ure
level (V
expired.
Figure 9-5.
9-5), the Brown-out Reset is immediately activated. When V
BOT+
INTERNAL
for details on operation of the Watchdog Timer.
TIME-OUT
RESET
RESET
VREG
in
FET
Watchdog Reset During Operation
Brown-out Reset During Operation
Figure
BOT+
9-5), the delay counter starts the MCU after the Time-out period t
= V
BOT
+ V
HYST
V
BOT-
/2 and V
CK
BOT-
= V
BOT
BOT
- V
= 2.7V. The trigger level has a hys-
HYST
V
t
CC
TOUT
BOT+
/2.
increases above the trigger
TOUT
2548E–AVR–07/06
BOT-
. Refer to
TOUT
in
Fig-
has