ATMEGA406-1AAU Atmel, ATMEGA406-1AAU Datasheet - Page 114
![IC AVR MCU 40K 1MHZ 48LQFP](/photos/6/76/67647/453-48-lqfp_sml.jpg)
ATMEGA406-1AAU
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
Available stocks
Company
Part Number
Manufacturer
Quantity
Price
Part Number:
ATMEGA406-1AAU
Manufacturer:
AT
Quantity:
20 000
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19. Voltage Regulator
19.1
19.2
114
Features
Operation
ATmega406
•
•
•
ATmega406 is supplied by the VFET terminal. Operating voltage range at the VFET terminal is
4.0 - 25V. The Internal Voltage Regulator regulates this voltage down to 3.3V, which is a suitable
supply voltage for the internal logic, I/O lines, and analog circuitry.
An external decoupling capacitor of 1 µF or larger is required for stable operation of the Voltage
Regulator. A larger capacitor will allow larger load currents and increase start-up time.
The block diagram of the Voltage Regulator is shown in
Figure 19-1. Voltage Regulator Block Diagram
The Regulator will operate in all sleep modes, including Power-off. In this mode the regulator will
automatically reduce the ATmega406's power consumption by turning off supply for all periph-
eral modules, allowing only the Charger Detect module and the Voltage Regulator itself to
operate.
The Regulator will automatically ensure that it has stable work conditions before allowing itself to
start regulating the VFET terminal. If the voltage at the VFET pin is below the Regulator-on
Threshold voltage, V
Powering-up the regulator is either done from the battery side when the smart battery controller
is assembled with the battery pack and there is no charger present, or from the charger side
when a deep discharge has occurred (0V charging).
When powering- up with a charger present, the voltage between the VFET and the PVT pin must
be above a Charge-Threshold voltage, V
Linear Regulation.
Operating Voltage Range 4.0 - 25V.
Fixed Output Voltage at 3.3V.
Rsense
RN
RP
PVT
PV1
ROT
, the LDO will be switched off.
Regulator
Control
CHT
POWER_OFF
LDO_ON
.
Voltage Regulator
Supply
Digital
Figure
Distributor
Regulator
Power
LDO
VFET
19-1.
Analog
Supply
VREG
2548E–AVR–07/06
Creg > 1 uF
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