Samsung RS2*3* Service Manual page 17

OPERATION PRINCIPLES BY PARTS OF CIRCUIT
5-3) RESET CIRCUIT
G RESET Circuit allows the whole program to go back to the initial setting by initializing parts such as the RAM in
MICOM with the power supply into MICOM or with an instant power failure.
Upon the power supply, the reset terminal voltage becomes "LOW" for several tens of ㎲ compared to Vcc
voltage(DC 5V) at MICOM, and it maintains "HIGH"(Vcc Voltage) during normal operation.
But, when Vcc drops down to 3.4~3.7V, the reset terminal voltage becomes "LOW".
5-4) EEPROM DETECTION CIRCUIT
G A semiconductor memory EEPROM stores data remembering previous settings regardless of power-off, which
are indispensable especially in power fluctuating areas. Also, EEPROM sets and uses other options in principle.
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