Integrated circuit with microprocessor and programmable internal

Details Integrated circuit with microprocessor and programmable internal Integrated circuit with microprocessor and programmable internal

1990-07-03

1991-07-30

Mis, David

Oscillators

Relaxation oscillators

331177R, 331179, H03K 302

Patent

active

050363000

ABSTRACT:
The disclosure concerns the manufacture of integrated circuits and, more precisely, that of integrated circuits containing a signal processor. To be able to make a purely internal clock in an integrated circuit, wherein this clock does not require any external adjusting elements connected to terminals of the circuit, the clock is designed to include an internal oscillator, the frequency of which is adjustable by a register, it being possible for the register to be loaded by the processor. The frequency of the oscillator may be adjusted to compensate for the uncertainty over the natural frequency of the oscillator (which is subject to technological fluctuations). It may also be used to adjust the frequency as a function of an application or of the environment of the circuit. The contents of the register may come from a non-volatile memory containing individual data on the circuit.

REFERENCES:
patent: 4691124 (1987-09-01), Ledzius et al.
patent: 4723114 (1988-02-01), D'Arrigo et al.

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