US6418501B1
Expired / Lapsed
US
⏱️ 0.0 years remaining
Memory card
Assignee: Fujitsu Ltd
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Filing: 1999-03-30
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Granted: 2002-07-09
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Expires: 2019-03-30
Abstract
Abstract A memory card realizes two interface standards. The memory card includes an input terminal receiving a grounded or open-circuited signal from a host unit when using the memory card in conformance with a first interface standard, and receiving a binary signal from the host unit when using the memory card in conformance with a second interface standard, a first circuit acquiring standard information which indicates the first or second interface standard, from a signal issued from the host unit, a second circuit outputting a high-level voltage when using the memory card in conformance with the first interface standard and outputting a high-impedance signal when using the memory card in conformance with the second interface standard, depending on the standard information acquired by the first circuit, and a resistor coupling an output of the second circuit and the input terminal.
Inventors
- 👤 Shinkichi Gama
- 👤 Yoshiki Okumura
- 👤 Takeshi Nagase
- 👤 Tomohiro Hayashi
- 👤 Yoshihiro Takamatsuya
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 22:17
CPC Classifications
G; G06; G06K; G06K19/00; G06K19/06; G06K19/067; G06K19/07; G06F; G06F13/00; G06F13/38; G06F13/40; G06F13/4063; G06F13/4068; G06F13/4086
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
137 words
A memory card which realizes two interface standards, comprising: an input terminal receiving a grounded or open-circuited signal from a host unit when using the memory card in conformance with a first interface standard, and receiving a binary signal from the host unit when using the memory card in conformance with a second interface standard; a first circuit acquiring standard information which indicates the first or second interface standard, from a signal issued from the host unit; a second circuit outputting a high-level voltage when using the memory card in conformance with the first interface standard and outputting a high-impedance signal when using the memory card in conformance with the second interface standard, depending on the standard information acquired by the first circuit; and a resistor coupling an output of the second circuit and the input terminal.
Claim 2
Dependent Claim
137 words
A memory card which realizes two interface standards, comprising: an input terminal receiving a grounded or open-circuited signal from a host unit when using the memory card in conformance with a first interface standard, and receiving a binary signal from the host unit when using the memory card in conformance with a second interface standard; a first circuit acquiring standard information which indicates the first or second interface standard, from a signal issued from the host unit; a second circuit outputting a high-level voltage when using the memory card in conformance with the first interface standard and outputting a high-impedance signal when using the memory card in conformance with the second interface standard, depending on the standard information acquired by the first circuit; and a resistor coupling an output of the second circuit and the input terminal.
Claim 3
Dependent Claim
40 words
The memory card as claimed in claim 1 , wherein said first circuit acquires the standard information by use of a power-ON reset signal when power is turned ON, by sampling and latching a signal issued from the host unit.
Claim 4
Dependent Claim
31 words
The memory card as claimed in claim 2 , wherein said second circuit includes a tristate buffer which receives as a control signal the standard information acquired by said first circuit.
Claim 5
Dependent Claim
31 words
The memory card as claimed in claim 1 , wherein said second circuit includes a tristate buffer which receives as a control signal the standard information acquired by said first circuit.
Claim 6
Dependent Claim
125 words
A memory card comprising: an input terminal receiving a grounded or open-circuited signal when using the memory card in conformance with a first interface standard, and receiving a binary signal when using the memory card in conformance with a second interface standard; a first circuit acquiring standard information which indicates the first or second interface standard, from an external signal; a second circuit having an output terminal which outputs a high-level signal when using the memory card in conformance with the first interface standard and outputs a high-impedance signal when using the memory card in conformance with the second interface standard, depending on the standard information acquired by the first circuit; and a resistor coupling the output of the second circuit and the input terminal.
Claim 7
Dependent Claim
125 words
A memory card comprising: an input terminal receiving a grounded or open-circuited signal when using the memory card in conformance with a first interface standard, and receiving a binary signal when using the memory card in conformance with a second interface standard; a first circuit acquiring standard information which indicates the first or second interface standard, from an external signal; a second circuit having an output terminal which outputs a high-level signal when using the memory card in conformance with the first interface standard and outputs a high-impedance signal when using the memory card in conformance with the second interface standard, depending on the standard information acquired by the first circuit; and a resistor coupling the output of the second circuit and the input terminal.
Claim 8
Dependent Claim
49 words
The memory card as claimed in claim 5 , wherein said first circuit acquires the standard information by use of a power-ON reset signal when power of a host unit coupled to the memory card is turned ON, by sampling and latching a signal issued from the host unit.
Claim 9
Dependent Claim
31 words
The memory card as claimed in claim 5 , wherein said second circuit includes a tristate buffer which receives as a control signal the standard information acquired by said first circuit.
Claim 10
Dependent Claim
29 words
The memory card as claimed in claim 5 , wherein said first interface standard is an IDE interface standard, and said second interface standard is a PCMCIA interface standard.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 2005-07-08 | 2006-01-07 | 2006-07-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2009-07-08 | 2010-01-07 | 2010-07-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2013-07-08 | 2014-01-07 | 2014-07-09 | $7700.00 | Window Closed / Lapsed |