| 摘要 |
PURPOSE: To simplify a peripheral circuit, and to stabilize a driver by turning into a 0V an unselected input/output gate output by the driving of a main clock without any help by an auxiliary clock. CONSTITUTION: The output end of a main decoder 302 is connected with the gates of a P-MOS transistor T2 and an N-MOS transistor T4 , and a pre-decoding processed clockϕYi end is connected with the gates of a P-MOS transistor T1 and an N-MOS transistor T3 , and the output of an input/output gate driver 301 operating at an NOR gate drives input/output gates 300 and 303. The NOR gate is constituted of residual pre-decoding processed clocksϕYj,ϕYk, andϕY1 and the output of the main decoder 302, and input/output gates 300', 300", 300"', 303', 303", and 303"' in which the outputs of input/output gate drivers 301', 301", 301"' are not selected are turned into 0V. Thus, a peripheral circuit can be simplified, and a driver can be stabilized.
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