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ATmega16HVB 数据表(PDF) 5 Page - ATMEL Corporation |
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ATmega16HVB 数据表(HTML) 5 Page - ATMEL Corporation |
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5 / 273 page  5 8042A–AVR–07/09 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 highest safety including safe authentication, low cost and high utilization of the cell energy. The device contains secure authentication features as well as autonomous bat- tery 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 PORTA (4) SRAM Flash CPU EEPROM PV2 NV OC FET Control Voltage ADC Voltage Reference Coulomb 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 TWI PPI NNI OD PORTA (4) SRAM Flash CPU EEPROM PV2 NV OC FET Control Voltage ADC Voltage Reference Coulomb 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 TWI PPI NNI OD |
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