| 摘要 |
A data storage control device controls a memory card which, including a non-volatile rewritable memory, operates using an external power supply. A DC/DC converter generates, by having a power supply of a +B voltage, a card operating voltage for operating the memory card. When delayed ACC is completed after an accessory power supply of a vehicle is turned off, a main microcomputer, a shutdown signal control unit, and a transistor set a shutdown terminal of the DC/DC converter to a low level by setting a main control signal input terminal to a high level and, thereby, stops operation of the DC/DC converter. This inhibits the occurrence of a case in which, after the accessory power supply of the vehicle is turned off, the circuit supplying power to the memory card affects other devices mounted in the vehicle. |
| 主权项 |
1. A data storage control device to control a memory card, the memory card including a non-volatile rewritable memory and operating using an external power supply, the data storage control device comprising:
an operating voltage generation circuit generating, by having power supplied from a battery mounted in a vehicle, a card operating voltage to operate the memory card; and an operation stopping unit stopping operation of the operating voltage generation circuit when a preset power supply stopping condition is met after an accessory power supply of the vehicle is turned off, the preset power supply stopping condition allowing the power supply to the memory card to be stopped. |
