| 摘要 |
PURPOSE:To decrease power consumption at the time of standby by supplying reduced power voltage to a part of RAM. CONSTITUTION:The random access memory equips static type memory cell circuit 31, in which plural cells are arrayed in matrix, address input circuits 32 and 33 which specify the addresses of memory cells, decoder circuits 34 and 35, decoder input circuit 36 which conducts I/O of data to/from memory cells, data output circuit 37, data output control circuit 38, and pressure reduction circuit 39. When power down input PD is high at standby, pressure reduction circuit 39 initiated and reduced voltage is supplied to circuit 31. |
