| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To provide a power source control unit in which current consumption during standby of a DRAM is reduced. <P>SOLUTION: This unit comprises: a mode detection circuit 4 in which a 'Disable' signal of an L level is reversed to an H level when 'Enable' and the 'Disable' signal is reversed to the H level when 'Disable'; and internal power source driver circuit 6 having a Pch-Tr6a and a Pch-Tr6b; and an internal power source reference circuit 5 in which when the 'Disable' signal of the L level is inputted, a first driver control signal is made to the L level and a second driver control signal is made to the H level, the Pch-Tr6b is turned on, the Pch-Tr6a is turned off, an outer power source VCC is supplied as an internal power source IVC, and when the 'Disable' signal of the H level is inputted, the first driver control signal is made to the H level, the level of the second driver control signal is controlled, the Pch-Tr6b is turned off, the Pch-Tr6a is controlled, and an internal power source IVC1 being lower than the outer voltage VCC is supplied. <P>COPYRIGHT: (C)2003,JPO</p> |
