| 摘要 |
<P>PROBLEM TO BE SOLVED: To allow plural memory cards to be connected to a device and to be electronically switched instead of manual replacement without modifying a circuit in the device, which uses the memory cards. <P>SOLUTION: A data bus and a power source are directly connected to memory cards. Only a clock line is switched with photo MOS relays. A clock is exclusively shared with only one of the memory cards. The clock is shared with the memory card from output of one of the photo MOS relays through a damping resistor of around 2 KΩ and a pull-up resistor of around 10 KΩ. <P>COPYRIGHT: (C)2013,JPO&INPIT |
