| 摘要 |
<p>An implementation method and system, main control device and smart card for information transmission are provided. The method includes: the smart card notifying the main control device of the operating mode supported thereby; the smart card receiving a clock frequency returned by the main control device, and the returned clock frequency being determined by the main control device according to the notified operating mode, and if the main control device determines that the smart card can support an externally provided clock frequency according to the operating mode notified by the smart card, the clock frequency returned by the main control device is a second clock frequency; judging whether the smart card itself can support the second clock frequency returned by the main control device, and if true, the smart card and the main control device carrying out information transmission on the basis of the clock control signal of the second clock frequency; otherwise the smart card carrying out the information transmission based on the clock control signal of the first clock frequency, and the main control device carrying out the information transmission based on the clock control signal of the second clock frequency.</p> |
