| 摘要 |
PROBLEM TO BE SOLVED: To provide a secure digital card capable of transmitting data through wireless networks which can implement such that an electronic device can transmit data through the wireless networks when reconstruction of the electronic device to save costs and to improve universality is not achieved.SOLUTION: An SD card comprises an SDIO interface, a selector switch, a memory unit, a baseband processing unit, a radio-frequency circuit, and an antenna. The selector switch comprises a first branch and a second branch. A read/write interface of the memory unit is coupled to the SDIO interface when the selector switch is connected to the first branch, and the read/write interface of the memory unit is coupled to the baseband processor when the selector switch is connected to the second branch. |
