Atmel AT73C260多种接口USB收发解决方案

Atmel 公司的AT73C260是片内USB收发器,完全和USB标准兼容,是双向差分接口,有三种不同的接口:数字,带或不带电缆的USB2.0 section 7和IC_USB1.0. AT73C260还包括3.5V电源监视器,低功耗的能带隙稳压器,3.3V 70mA线性电压稳压器和1.8V-3.0V 70mA线性电压稳压器SIM FTA.主要用在移动USB UICC (ETSI 102 600), PC USB UICC以及 Token USB(口令密码USB).本文介绍了AT73C260主要特性, 方框图和上行和下行端口框图以及各种接口的应用框图,外接元件列表, AT73C260-EK1评估套件主要特性和电路图.

The AT73C260 is an Inter Chip USB transceiver fully compliant with the Universal Serial Bus Specification, and more specifically with the IC_USB1.0 supplement. The AT73C260 is a bidirectional differential interface. The AT73C260 is ideal for applica­tions in mobile devices, PCs and USB tokens making use of an USB UICC.

The AT73C260’s upstream facing port may be connected to three different interfaces:

•Digital

•USB2.0 section 7 with or without cable

•IC_USB1.0

The AT73C260’s downstream port complies with IC_USB1.0. The AT73C260’s mode is selected by three pins. When PVCC is powered by 3.3V and pull down resistors are added on PDM and PDP, the AT73C260’s downstream port complies with USB2.0 section 7.
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