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US 2012/0256596 A1Published application
Input-output circuit
AssigneeSemiconductor Components Industries, LLC
InventorsAtsushi WADA, Hajime MIZUKAMI, Mitsuaki HATAKEYAMA, Shigeto KOBAYASHI
Life of this patent
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Abstract
A power supply detection circuit detects power feeding to a VBUS terminal from the outside. A charger detection circuit specifies the kind of charger by detecting the voltages of a DP terminal and a DM terminal. The charger detection circuit detects open, pull-up, pull-down of at least one of the DP terminal and the DM terminal or formation of a short circuit between both the terminals.
Claims7
An input-output circuit that connects a connector including:
- at least a power supply terminal;
- and a first data terminal and a second data terminal, which are data terminals of a differential pair, and an internal circuit to each other, the input-output circuit comprising:
- a power supply detection circuit that detects power feeding to the power supply terminal from the outside;
- and
- a charger detection circuit that specifies the kind of charger by detecting voltages of the first data terminal and the second data terminal, wherein
- the charger detection circuit detects open, pull-up, pull-down of at least one of the first data terminal and the second data terminal, or formation of a short circuit between both the terminals.
3 more elements
Dependencies are inferred from the claim text.