Semiconductor integrated circuit in which voltage down converter output can be observed as digital value and voltage down converter output voltage is adjustable
First Claim
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1. A semiconductor integrated circuit, comprising:
- a first terminal receiving an external power supply voltage provided from outside;
a voltage generating circuit lowering said external power supply voltage and generating an internal voltage;
an internal circuit using said internal voltage;
an A/D conversion circuit converting said internal voltage from an analog value to a digital value so as to output a digital signal to the outside; and
a second terminal providing said digital signal to the outside.
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Abstract
An output voltage of a VDC circuit is subjected to A/D conversion with an on-chip A/D converter. Accordingly, an output voltage VDCout of the VDC circuit can be observed as a digital value, which facilitates measurement. Reduction in the number of terminals leads to reduction in chip size. In addition, the terminal that has been used for providing voltage VDCout can be used for other purposes. Therefore, a semiconductor integrated circuit allowing for easy mass production test and reduced number of man-hours in the mass production test can be provided.
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Citations
17 Claims
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1. A semiconductor integrated circuit, comprising:
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a first terminal receiving an external power supply voltage provided from outside;
a voltage generating circuit lowering said external power supply voltage and generating an internal voltage;
an internal circuit using said internal voltage;
an A/D conversion circuit converting said internal voltage from an analog value to a digital value so as to output a digital signal to the outside; and
a second terminal providing said digital signal to the outside. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17)
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Specification