Semiconductor integrated circuit, memory card having the semiconductor integrated circuit and method of using the memory card
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United States of America Patent
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N/A
Issued Date -
Apr 24, 2003
app pub date -
Oct 23, 2002
filing date -
Oct 24, 2001
priority date (Note) -
Abandoned
status (Latency Note)
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Abstract
A semiconductor integrated circuit including a first interface circuit, a second interface circuit, a switching circuit. The first interface circuit output a low-level contact mode signal when no power supply voltage is supplied, and to output a high-level contact mode signal when a power supply voltage is supplied. The second interface circuit to output a low-level wireless mode signal when no power supply voltage is supplied, and to output a high-level wireless mode signal when a power supply voltage is supplied. The switching circuit to switch a communication mode to a contact mode in the case of the high-level contact mode signal and the low-level wireless mode detecting signal, and to switch the communication mode to a wireless mode in the case of the low-level contact mode signal and the high-level wireless mode signal.
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