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US 6,286,065 B1Granted
Microcomputer having a built-in A/D converter with a resistor between an external terminal and an I/O circuit
AssigneeNEC Corporation
InventorHideyuki Suzuki
Life of this patent
Estimating the term…
Abstract
The present invention provides a microcomputer having a built-in A/D converter circuit and sharing an external terminal with an input terminal of the A/D converter so as to reduce the size and weight of the semiconductor integrated circuit, wherein a resistor is inserted to eliminate deterioration of the A/D converter circuit due to the reduction in the number of the terminals.
Claims6
A microcomputer comprising:
- an internal circuit having a data processing function;
- a built-in A/D converter circuit connected to said internal circuit;
- an I/O circuit connected to said internal circuit;
- an external terminal for input/output shared by an input terminal of said A/D converter circuit;
- a first branch wire connecting said external terminal via said I/O circuit to said internal circuit;
- a second branch wire connecting said external terminal to said A/D converter circuit, and
- a predetermined resistor inserted on said first branch wire connecting said external terminal to said I/O circuit and designed to have a sufficiently higher resistance than a parasitic resistance of said first branch wire.
4 more elements
Dependencies are inferred from the claim text.