| 摘要 |
<p>PURPOSE:To reduce the power consumption to extend the use time of an incorporated battery. CONSTITUTION:When a command 111 to instruct the use of an external connection device 12 is outputted from a CPU 11 to a decoder 12, the decoder 12 decodes this command 111. When decoding the command 111, the decoder 12 outputs a power supply control instruction 121 to an I/O register 13 to set or reset the I/O register 13. A power supply control part 14 outputs a power supply control signal 141 to an external device connection part 15 in accordance with an output 131 of the I/O register 13 to control the power supply to the external device connection part 15. When the CPU 11 does not use the external connection device 2, power supply to the external device connection part 15 is cut off.</p> |
