JPS60221816A - One chip microcontroller - Google Patents

One chip microcontroller

Info

Publication number
JPS60221816A
JPS60221816A JP7749584A JP7749584A JPS60221816A JP S60221816 A JPS60221816 A JP S60221816A JP 7749584 A JP7749584 A JP 7749584A JP 7749584 A JP7749584 A JP 7749584A JP S60221816 A JPS60221816 A JP S60221816A
Authority
JP
Grant status
Application
Patent type
Prior art keywords
circuit
power supply
supply voltage
controller
generation
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
JP7749584A
Inventor
Mitsuharu Kato
Original Assignee
Nippon Denso Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date

Links

Abstract

PURPOSE: To simplify the constitution of a titled controller by making an interruption processing circuit of the inside unnecessary without providing an input terminal of a control signal in case when a power supply voltage has been varied, by preventing the generation of malfunction of an internal operation when the power supply voltage has been varied, by the inside of a controller.
CONSTITUTION: An internal circuit part consisting of a program counter 16 connected to a control bus 29, an address bus 30 and a data bus 31, a program memory 17, a ROM18, a calculating part 20, a RAM23, etc., and a two-phase clock generating circuit 15 for supplying a driving clock signal to said circuit part are provided on a semiconductor substrate. A voltage of a Vdd power source 11 from power source terminals P1, P2 of this controller is applied to the first power supply voltage detecting circuit 12 and the second power supply voltage detecting circuit 13. A state that the power supply voltage is below a voltage for operating stably the internal circuit part is detected by this circuit 12, and the generation of a clock from the circuit 15 is stopped. Also, a voltage by which the internal circuit part can hold its operating state is detected by the circuit 13, a reset signal is generated, and the generation of malfunction is prevented by the inside of the controller.
COPYRIGHT: (C)1985,JPO&Japio
JP7749584A 1984-04-19 1984-04-19 One chip microcontroller Pending JPS60221816A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP7749584A JPS60221816A (en) 1984-04-19 1984-04-19 One chip microcontroller

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP7749584A JPS60221816A (en) 1984-04-19 1984-04-19 One chip microcontroller
US06722075 US4766567A (en) 1984-04-19 1985-04-11 One-chip data processing device including low voltage detector

Publications (1)

Publication Number Publication Date
JPS60221816A true true JPS60221816A (en) 1985-11-06

Family

ID=13635557

Family Applications (1)

Application Number Title Priority Date Filing Date
JP7749584A Pending JPS60221816A (en) 1984-04-19 1984-04-19 One chip microcontroller

Country Status (1)

Country Link
JP (1) JPS60221816A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5489863A (en) * 1993-11-01 1996-02-06 Nec Corporation Reset circuit

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5489863A (en) * 1993-11-01 1996-02-06 Nec Corporation Reset circuit

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