| 摘要 |
A single-chip microcomputer and electronic device using the same are ideally adapted for an electronic notebook, electronic dictionary and the like with a reduced overall system power consumption. The single-chip microcomputer to which are connected externally connected devices any one of which can be selected by a chip select signal executes program instructions. The single-chip microcomputer has a chip select signal output terminal which makes active and outputs a chip select signal selecting one of the externally connected devices. The single-chip microcomputer further has standby state setting means which outputs a standby state setting signal temporarily halting the execution of program instructions and control means for changing said chip select signal which is active to be inactive based on the standby state setting signal from the standby state setting means.
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