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ATMEGA16HVB Datasheet(PDF) 5 Page - ATMEL Corporation

Part No. ATMEGA16HVB
Description  8-bit Microcontroller with 16K/32K Bytes In-System Programmable Flash
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Maker  ATMEL [ATMEL Corporation]
Homepage  http://www.atmel.com
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5
8042AS–AVR–09/08
ATmega16HVB/32HVB
2.
Overview
The ATmega16HVB/32HVB is a monitoring and protection circuit for 3 and 4-cell Li-ion applica-
tions with focus on high security/authentication, low cost and high utilization of the cell energy.
The device contains secure authentication features as well as autonomous battery protection
during charging and discharging. The External Protection Input can be used to implement other
battery protection mechanisms using external components, e.g. protection against chargers with
too high charge voltage can be easily implemented with a few low cost passive components.
The feature set makes the ATmega16HVB/32HVB a key component in any system focusing on
high security, battery protection, high system utilization and low cost.
Figure 2-1.
Block Diagram
ATmega16HVB/32HVB provides the necessary redundancy on-chip to make sure that the bat-
tery is protected in critical failure modes. The chip is specifically designed to provide safety for
the battery cells in case of pin shorting, loss of power (either caused by battery pack short or V
CC
PORTA (4)
SRAM
Flash
CPU
EEPROM
PV2
NV
OC
OD
FET
Control
Voltage
ADC
Voltage
Reference
Coulumb
Counter ADC
GND
VCC
RESET/dW
Power
Supervision
POR &
RESET
Watchdog
Oscillator
Watchdog
Timer
Oscillator
Circuits /
Clock
Generation
VREF
VREFGND
PI
NI
PA3..0
PA1..0
8/16-bit T/C1
8/16-bit T/C0
PORTB (8)
PB7..0
SPI
Voltage
Regulator
Charger
Detect
VFET
VREG
BATT
PV1
DATA BUS
VPTAT
Current
Protection
Security
Module
PORTC (6)
PC5..0
Voltage Regulator
Monitor Interface
PB0
Oscillator
Sampling
Interface
Program
Logic
debugWIRE
Cell
Balancing
PV3
PV4
OPC
TWI
PPI
NNI
PORTA (4)
SRAM
Flash
CPU
EEPROM
PV2
NV
OC
OD
FET
Control
Voltage
ADC
Voltage
Reference
Coulumb
Counter ADC
GND
VCC
RESET/dW
Power
Supervision
POR &
RESET
Watchdog
Oscillator
Watchdog
Timer
Oscillator
Circuits /
Clock
Generation
VREF
VREFGND
PI
NI
PA3..0
PA1..0
8/16-bit T/C1
8/16-bit T/C0
PORTB (8)
PB7..0
SPI
Voltage
Regulator
Charger
Detect
VFET
VREG
BATT
PV1
DATA BUS
VPTAT
Current
Protection
Security
Module
PORTC (6)
PC5..0
Voltage Regulator
Monitor Interface
PB0
Oscillator
Sampling
Interface
Program
Logic
debugWIRE
Cell
Balancing
PV3
PV4
OPC
TWI
PPI
NNI




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