PDIUSBD12是Philips公司推出的一款低价位、高性能的并行USB接口芯片。它完全遵从USB1.1协议 ,适用于大多数USB设备 (如 :图像设备、海量存储设备、通信设备、打印设备和人机接口设备 )的设计。文中介绍了PDIUSBD12的功能原理 ,并以ADuC812为控制器 ,给出了PDIUSBD12在非DMA方式下的接口应用电路。 PDIUSBD12 is Philips introduced a low-cost, high-performance parallel USB interface chip. It is fully compliant with the USB 1.1 protocol and is suitable for the design of most USB devices such as imaging devices, mass storage devices, communication devices, printing devices, and human interface devices. In this paper, the functional principle of PDIUSBD12 is introduced, and the ADuC812 is used as the controller. The interface application circuit of PDIUSBD12 in non-DMA mode is given.