Microprocessor equipped with an A/D converter

Details Microprocessor equipped with an A/D converter Microprocessor equipped with an A/D converter

1997-07-23

2000-04-04

Young, Brian

Coded data generation or conversion

Analog to or from digital conversion

Analog to digital conversion

3952003, H03M 112, G06F 1516

Patent

active

060466928

ABSTRACT:
A microprocessor which can be used as a microprocessor with 8-bit A/D converter or 10-bit A/D converter is disclosed. Voltage comparator 2 compares the analog input signal AIN level with the reference voltage VREF, and then generates the comparative signal CP. The comparative signal CP is supplied to the serial conversion register 3 in order and is stored as the converted data DC. The upper 8 bits of the converted data DC stored in the serial conversion register 3 are supplied to the conversion result register 4A, and the lower 2 bits are supplied to the conversion result register 5A. In this way, in the case where this microprocessor is used as an microprocessor with a built-in 8-bit A/D converter, the microprocessor only ignores the contents of the conversion result register 5A.

REFERENCES:
patent: 3581304 (1971-05-01), Paradise
patent: 3976831 (1976-08-01), Danell et al.
patent: 4366469 (1982-12-01), Michaels et al.
patent: 5432949 (1995-07-01), Baba
Burton et al.; Analog Devices; Microprocessor Systems Handbook; pp. 60-71, 74-83, 155-162, Oct. 1977.

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