Low-power-consumption card-reading device

The utility model, which relates to the card reader field, discloses a low-power-consumption card-reading device comprising a micro-control chip, a radio-frequency processing chip, a radio-frequency processing unit, and an antenna. The micro-control chip carries out communication with the radio-frequency processing chip by a serial external interface and is respectively connected with a first crystal oscillator and a second crystal oscillator. The first crystal oscillator provides a low-speed clock for the micro-control chip; and the second crystal oscillator provides a high-speed clock for the micro-control chip. The micro-control chip controls the work mode of the radio-frequency processing unit based on high and low levels of chip selection signals. On the premise that the card reading function is realized, the micro-control chip, the radio-frequency identification chip, and the antenna are in a sleep or off state, thereby reducing the power consumption of the whole card-reading device. Moreover, the card-reading device has characteristics of simple integrated circuit, easy control, low power consumption, simple structure, low cost, and high reliability.