Power on reset circuit with predetermined reset pulse duration
A power on reset circuit comprises a comparator 7 which produces a high output when the supply voltage rises above a reference; this causes circuit 17 to produce a reset pulse of duration determined by capacitor 17a and resistor 17b, which is supplied to memory control circuit 4. Additional circuitr...
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| Sprache: | eng |
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| Zusammenfassung: | A power on reset circuit comprises a comparator 7 which produces a high output when the supply voltage rises above a reference; this causes circuit 17 to produce a reset pulse of duration determined by capacitor 17a and resistor 17b, which is supplied to memory control circuit 4. Additional circuitry 16 is provided to issue a memory clear command to memory control circuit 4. The comparator output may also be used to switch in a back-up battery supply if the main power supply fails. …… |
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