PDIUSBD12 is a low-price and high-speed USB interface device with parallel bus made by Philips. It complies with the USB specification Rev. 1.1. Peripheral devices such as the printer,scanner and digital camera can use PDIUSBD12 in transferring data over USB. Introduces the function of PDIUSBD12,and it presents the application of PDIUSBD12 in the control unit for step motor with AT89C52 as controller.%PDIUSBD12是Philips公司推出的一款性价比很高的并行USB接口芯片.它完全遵从USB1.1协议,适用于大多数USB设备(打印机、扫描仪和数码相机等)的设计.介绍了PDIUSBD12的功能原理,并以AT89c52单片机为控制器,给出了PDIUSBD12在步进电动机控制单元接口的应用电路.
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