发明名称 |
IC with internal interface switch for testability |
摘要 |
A semiconductor integrated circuit which is provided with a shift scan path incorporated in each function module and a testing I/O terminal connected to a shift scan path and provided separately from a normal-operation-use I/O terminal, and which comprises, all formed on one semiconductor chip, a bus interface circuit for connecting normal-operation-use I/O terminals of a plurality of function modules to a bus, an external interface switching circuit which switches between the bus-side I/O terminal of the bus interface circuit and the testing I/O terminal of each function module for connection to an external terminal and an interface control circuit for switch-controlling the external interface switching circuit.
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申请公布号 |
US7013415(B1) |
申请公布日期 |
2006.03.14 |
申请号 |
US20010979333 |
申请日期 |
2001.11.21 |
申请人 |
HITACHI ULSI SYSTEMS CO., LTD. |
发明人 |
KAMEI TATSUYA;NISHIMOTO JUNICHI;TATEZAWA KEN |
分类号 |
G01R31/28;G01R31/3185;G06F11/267 |
主分类号 |
G01R31/28 |
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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