ATMEGA406-1AAU Atmel, ATMEGA406-1AAU Datasheet - Page 125

• 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

22. Battery Protection
22.1
Table 22-1.
2548E–AVR–07/06
Battery Protection Type
Deep Under-voltage
Detected
Discharge Over-current
Protection
Charge Over-current
Protection
Short-circuit Protection
Features
Effect of Battery Protection Types
•
•
•
•
•
•
If the voltage at the VFET pin falls below the programmable Deep Under-voltage detection level,
C-FET, PC-FET, and D-FET are disabled and the chip is set in Power-off mode to reduce power
consumption to a minimum.
The Current Battery Protection circuitry (CBP) monitors the charge and discharge current and
disables C-FET, PC-FET, and D-FET if an over-current or short-circuit condition is detected.
There are three different programmable detection levels: Discharge Over-current Detection
Level, Charge Over-current Detection Level and Short-circuit Detection Level. The external filter
at the PI/NI input pins will cause too large delay for short-circuit detection. Therefore the sepa-
rate PPI/NNI inputs are used for Current Battery Protection. There are two different
programmable delays for activating Current Battery Protection: Short-circuit Reaction Time and
Over-current Reaction Time. After Current Battery Protection has been activated, the application
software must re-enable the FETs. The Battery Protection hardware provides a hold-off time of 1
second before software can re-enable the discharge FET. This provides safety in case the appli-
cation software should unintentionally re-enable the discharge FET too early.
The activation of a protection also issues an interrupt to the CPU. The battery protection inter-
rupts can be individually enabled and disabled by the CPU.
The effect of the various battery protection types is given in
In order to reduce power consumption, both Short-circuit and Discharge Over-current Protection
are automatically deactivated when the D-FET is disabled. The Charge Over-current Protection
is disabled when both the C-FET and the PC-FET are disabled. Note however that Charge Over-
current Protection is never automatically disabled when any of the C-FET or PC-FETs are con-
trolled by PWM.
Interrupt Requests
CPU Reset on exit
Entry and exit
Entry and exit
Entry and exit
Deep Under-voltage Protection
Charge Over-current Protection
Discharge Over-current Protection
Short-circuit Protection
Programmable and Lockable Detection Levels and Reaction Times
Autonomous Operation Independent of CPU
C-FET
Disabled
Disabled
Disabled
Disabled
D-FET
Disabled
Disabled
Disabled
Disabled
PC-FET
Disabled
Disabled
Disabled
Disabled
Cell Balancing FETs
Disabled
Operational
Operational
Operational
Table
22-1.
ATmega406
MCU
Power-off
Operational
Operational
Operational
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