UPD6P8 NEC [NEC], UPD6P8 Datasheet - Page 38

• Manufacturer Part Number: UPD6P8
• Description: MOS INTEGRATED CIRCUIT 4-BIT SINGLE-CHIP MICROCONTROLLER FOR INFRARED REMOTE CONTROL TRANSMISSION
• Manufacturer: NEC [NEC]

8. POC CIRCUIT
battery is replaced.
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The POC circuit monitors the power supply voltage and applies an internal reset to the microcontroller when the
Cautions 1. There are cases in which the POC circuit cannot detect a low power supply voltage of less
2. Clock oscillation is stopped by the resonator due to low power supply voltage before the
3. In order to prevent malfunction, be sure to input a low level to one or more of pins K
than 1 ms. Therefore, if the power supply voltage has become low for a period of less than
1 ms, the POC circuit may malfunction because it does not generate an internal reset signal.
POC circuit generates the internal reset signal. In this case, malfunction may result when
the power supply voltage is recovered after the oscillation is stopped.
phenomenon takes place because the POC circuit does not generate an internal reset signal
(because the power supply voltage recovers before the low power supply voltage is
detected) even though the clock has stopped. If, by any chance, a malfunction has taken
place, remove the battery for a short time and put it back. In most cases, normal operation
will be resumed.
K
the pull-down resistor connected).
I3
when POC is released due to supply voltage rising (Can be left open. When open, leave
Data Sheet U17848EJ3V0DS
PD6P8, 6P8A, 6P8B
This type of
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to