AVR354: Using the Deep Under-Voltage Recovery Mode (DUVR) [PDF!] DUVR mode represents the intelligent pre-charge mode for Atmel’s smart battery microcontrollers ATmega16HVA, ATmega8HVA, ATmega8HVD and ATmega4HVD. It is intended for controlled charging of cells even when the cell voltage is below the minimum operating voltage of the chip. The charging is done without using a […]