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поискавой системы для электроныых деталей |
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поискавой системы для электроныых деталей |
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ATmega32HVB датащи(PDF) 132 Page - ATMEL Corporation |
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ATmega32HVB датащи(HTML) 132 Page - ATMEL Corporation |
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132 / 273 page  132 8042A–AVR–07/09 ATmega16HVB/32HVB 23. Voltage Regulator 23.1 Features • Input voltage from 4-25V • Fixed output voltage of 3.3V • Battery Pack Short Detection • Black-out Detection (BLOD) 23.2 Overview ATmega16HVB/32HVB get its voltage supply through the VFET terminal. Operating range at the VFET terminal is 4 - 25V. The on-chip LDO regulator regulates the VFET terminal down to 3.3V, which is a suitable supply voltage for the internal logic, I/O lines and analog circuitry. Figure 23- 1 illustrates the Voltage Regulator. Figure 23-1. Voltage Regulator. To ensure safe operating condition the Voltage Regulator has built in protection mechanisms to protect the internal circuitry if the voltage drops on either the input or output terminal. The Regu- lator Monitoring includes • Battery Pack Short Detector • Black-out Detector An external decoupling capacitor (CREG) of minimum 1 µF is needed to ensure stable regulator operation. The same capacitor also serves as a reservoir capacitor to ensure that the chip is able to operate for some time without voltage at the VFET terminal. Regulator Monitor and Control Interface LDO Regulator Databus VFET DISABLE VFET IRQ BLOD POWER-OFF CREG VREG Battery Short Detect ROCR Black-out Detect |
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