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Unlock MCU ATMEGA48A can turn the status of microcontroller from locked to unlocked one, then extract the embedded firmware out from its memory which include the content inside flash and eeprom;

Unlock MCU ATMEGA48A can turn the status of microcontroller from locked to unlocked one, then extract the embedded firmware out from its memory which include the content inside flash and eeprom

Response time is the minimum time, after selecting a new reference voltage or input source, before the comparator output is to have a valid level. If the comparator inputs are changed, a delay must be used to allow the comparator to settle to its new state.

Please see Table 12-1 for comparator response time specifications. The comparator output is read through CMCON0 register. This bit is read-only. The comparator output may also be used internally.

The comparator wake-up flag is set whenever all of the following conditions are met:

· CWU = 0 (CMCON0<0>)

· The output of the comparator has changed state The wake-up flag may be cleared in software or by another device Reset. When the comparator is active and the device is placed in Sleep mode, the comparator remains active.

While the comparator is powered-up, higher Sleep currents than shown in the power-down current specification will occur. To minimize power consumption while in Sleep mode, turn off the comparator before entering Sleep when decipher texas instrument microcontroller MCU.

A Power-on Reset (POR) forces the CMCON0 register to its Reset state. This forces the Comparator modul to be in the comparator Reset mode. This ensures that all potential inputs are analog inputs.

Device current is minimized when analog inputs are present at Reset time. The comparator will be powered-down during the reset interval. A simplified circuit for an analog input is shown in Figure 8-3. Since the analog pins are connected to a digital output, they have reverse biased diodes to VDD and VSS. The analog input therefore, must be between VSS and VDD.

If the input voltage deviates from this range by more than 0.6V in either direction, one of the diodes is forward biased and a latch-up may occur. A maximum source impedance of 10 kÙ is recommended for the analog sources. Any external component connected to an analog input pin, such as a capacitor or a Zener diode, should have very little leakage current.