Microcontroller with firmware selectable oscillator trimming

Details Microcontroller with firmware selectable oscillator trimming Microcontroller with firmware selectable oscillator trimming

1996-05-24

1998-08-18

Grimm, Siegfried H.

Oscillators

With frequency calibration or testing

331143, 331175, 331177R, H03K 30231, H03L 100

Patent

active

057963126

ABSTRACT:
A microcontroller circuit having firmware selectable oscillator trimming includes, in combination, a microcontroller, an oscillator located within the microcontroller for providing a system clock signal for the microcontroller, and a memory portion for providing trimming data to the oscillator for trimming frequency of the system clock. The microcontroller circuit includes microcontroller logic which has the trimming data stored therein for transfer to the memory portion. Additionally, the microcontroller logic permits the user to alter the trimming data after it has been transferred to the memory portion, thereby permitting the user to alter the amount of modification of the system clock frequency from the amount associated with the trimming data.

REFERENCES:
patent: 4964141 (1990-10-01), Matsushima et al.
patent: 5036300 (1991-07-01), Nicolai
patent: 5272650 (1993-12-01), Adams et al.
patent: 5583819 (1996-12-01), Roesner et al.

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