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热词
    • 5. 发明授权
    • Digital integrated circuit
    • 数字集成电路
    • US4267463A
    • 1981-05-12
    • US969891
    • 1978-12-15
    • Hiroshi Mayumi
    • Hiroshi Mayumi
    • G06F7/00G01R31/28G01R31/3185G06F11/22H03K19/0175H03K19/177H03K19/20
    • G01R31/318516
    • A digital integrated circuit is provided with a maximum number of input and output terminals assigned for a normal operation mode and the number of terminals required for a function test is minimized. The integrated circuit is additionally provided with at least one control terminal, the functions of at least a part of the input and output terminals being determined in response to the logical level at the control terminal. Terminal utilization efficiency is further enhanced if the control terminal is connected to an inverter which is nonresponsive to the normal logic mode voltage range but which is responsive to a voltage outside the normal logic mode voltage range.
    • 数字集成电路具有分配给正常操作模式的最大数量的输入和输出端子,并且功能测试所需的端子数量被最小化。 集成电路另外设置有至少一个控制端子,响应于控制端子处的逻辑电平来确定至少一部分输入和输出端子的功能。 如果控制终端连接到对正常逻辑模式电压范围不响应但响应于正常逻辑模式电压范围之外的电压的逆变器,则终端利用效率进一步增强。