发明名称 |
INTEGRATED CIRCUIT, SEMICONDUCTOR DEVICE AND ID CHIP |
摘要 |
A contactless semiconductor device is provided where a low power consumption is achieved and wireless communication is carried out stably. A power supply level of a reader/writer and the operating state of internal blocks of an ID chip are monitored. In accordance with such conditions, a clock signal of an optimal frequency and a power supply potential of an optimal level are selected to be supplied. By setting the operating mode in accordance with the power supply level or the power saving mode in accordance with the operating state of each block, a low power consumption ID chip and stable wireless communication can be provided. |
申请公布号 |
KR20060042974(A) |
申请公布日期 |
2006.05.15 |
申请号 |
KR20050013483 |
申请日期 |
2005.02.18 |
申请人 |
SEMICONDUCTOR ENERGY LABORATORY K.K. |
发明人 |
KATO KIYOSHI;KOYAMA JUN |
分类号 |
G06K19/077;G06F1/26;G06F1/32;G06K7/00;G06K19/07;G07F7/08;G07F7/10;H01L21/82;H01L27/02;H01L27/04 |
主分类号 |
G06K19/077 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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