发明名称 |
Semiconductor integrated circuit and IC card using the same. |
摘要 |
A semiconductor integrated circuit comprises a writable non-volatile memory 35; a writing voltage-generating circuit for generating a writing voltage and supplying it to the non-volatile memory; an oscillating circuit 16 generating a first clock signal and supplying it to the writing voltage-generating circuit; a timer 12 measuring a time required for applying the writing voltage to the non-volatile memory; a control circuit 11 controlling the writing to the non-volatile memory; and a switching device 18 for selecting either the first clock signal generated in the oscillating circuit, or a second clock signal to be input externally in accordance with a control signal from the control circuit, and supplying the selected signal to the timer and the control circuit as a clock. <IMAGE>
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申请公布号 |
EP0587445(A2) |
申请公布日期 |
1994.03.16 |
申请号 |
EP19930307174 |
申请日期 |
1993.09.10 |
申请人 |
MITSUBISHI DENKI KABUSHIKI KAISHA |
发明人 |
YAMAGUCHI, ATSUO |
分类号 |
G06F15/78;G06K19/07;G11C16/10;G11C16/30;(IPC1-7):G06F15/78 |
主分类号 |
G06F15/78 |
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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