One-chip data processor with built-in A/D converter for automati

Details One-chip data processor with built-in A/D converter for automati One-chip data processor with built-in A/D converter for automati

1993-05-07

1994-03-01

Chan, Eddie F.

Coded data generation or conversion

Analog to or from digital conversion

Multiplex

364DIG2, 364926, 3649278, 3649481, 395800, 341155, G06F 300, H03M 112

Patent

active

052911977

ABSTRACT:
A data processing unit according to the present invention has a central processing unit, and an analog-to-digital converter circuit associated with a plurality of input nodes respectively supplied with analog signals. The analog-to-digital converter circuit is established in one of three modes of operations, i.e., a fixed mode of operation for focusing the A/D converting operation on one analog signal of a specified input node, a scanning mode of operation for sequentially converting the analog signals into corresponding digital signals and a mixed mode of operation for performing the fixed mode of operation once or a predetermined number of times before automatically returning to the scanning mode of operation, so that the central processing unit does not need to shift the analog-to-digital converter circuit from the fixed mode to the scanning mode if the mixed mode is selected, thereby improving the throughput of the central processing unit.

REFERENCES:
patent: 4839795 (1989-06-01), Iwaksaki
Yager, Charles, Electronic Design, "Data-Acquisition System Fits on a Smart Peripheral Chip", vol. 35, No. 5, Mar. 5, 1987.
Yager, Charles and O'Hara, Harlan, Electronics & Wireless World, "Single-Chip Data Acquisition Subsystem", vol. 93, No. 1620, Oct. 1987.
Crescenzo, Electronique Industrielle, "Microcontroleur 16 Bits", No. 20, May 1988, pp. 28-33.

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