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ATmega32HVB датащи(PDF) 152 Page - ATMEL Corporation |
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ATmega32HVB датащи(HTML) 152 Page - ATMEL Corporation |
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152 / 273 page ![]() 152 8042A–AVR–07/09 ATmega16HVB/32HVB Pack+ will therefore rise to the charger voltage for a short period before the C-FET is enabled. 7. Battery voltage reached charger voltage. 25.3.3 Deep Under Voltage operation with Pre-charge FET If a charger without pre-charge functionality is used, the Pre-charge FET will provide the current path and the pre-charge resistor will limit the charge current during charging of deeply over-dis- charged cells. After reaching sufficient battery voltage it is safe to turn on the Charge FET to increase the charge current. Deep Under Voltage Operation with Pre-charge FET is supported through PC5, which is a high voltage open drain pin. For configuration and usage of this pin, see ”High Voltage I/O Ports” on page 62. 25.3.4 Operation in Reset and Power off In reset and power-off the C-FET and D-FET will be automatically turned off. Safety is remained by active pulling OC/OD hard to ground. |
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