The PDIUSBD12 is a cost- and feature-optimized USB peripheral controller. It is normally used in microcontroller-based systems and communicates with the system microcontroller over the high-speed general-purpose parallel interface. It also supports local DMA transfer.
This modular approach to implementing a USB interface allows the designer to choose the optimum system microcontroller from the wide variety available. This flexibility cuts down development time, risks and costs, by allowing the use of the existing architecture, minimizing firmware investments. This results in the fastest way to develop the most cost-effective USB peripheral solution.
The PDIUSBD12 fully conforms to Universal Serial Bus Specification Rev. 2.0, supporting data transfer at full-speed (12 Mbit/s). It is also designed to be compliant with most device class specifications: imaging class, mass storage devices, communication devices, printing devices and human interface devices. The PDIUSBD12 is ideally suited for many peripherals, such as printer, scanner, external mass storage (Zip drive) and digital still camera. It offers an immediate cost reduction for applications that currently use SCSI implementations.
The PDIUSBD12 low suspend power consumption along with the LazyClock output allows for easy implementation of equipment that is compliant to the ACPI, OnNow and USB power management requirements. The low operating power allows the implementation of bus powered peripherals.
It also incorporates features, such as SoftConnect™, GoodLink™, programmable clock output, low frequency crystal oscillator, and integration of termination resistors. All of these features contribute to significant cost savings in the system implementation and at the same time ease the implementation of advanced USB functionality into peripherals.
