PDIUSBD11

General description

The Universal Serial Bus hub PDIUSBD11 is a cost and feature-optimized USB interface device. It is used in microcontroller-based systems and communicates with the system microcontroller over the high speed I²C serial bus. This modular approach to implementing USB functions allows the designer to choose the optimum system microcontroller from the available wide variety. This flexibility cuts down the development time, risks, and costs by allowing the use of the existing architecture and the firmware investments. This results in the fastest way to develop the most cost-effective USB peripheral solutions. The PDIUSBD11 is ideally suited for computer monitors, docking stations, keyboards, and many other applications that use the I²C or the SMBus-based architecture.

The PDIUSBD11 conforms to the USB specification Rev. 1.1, I²C serial interface and the SMBus specifications. It is fully compliant with the Human Interface Device Class and Monitor Control Class specifications. Its low suspend power consumption along with the programmable 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 function.

The PDIUSBD11 is fully backward compatible to the PDIUSBH11/PDIUSBH11A software. In addition, it also incorporates the feature enhancements like SoftConnect^TM, LazyClock, programmable clock output, lower frequency crystal oscillator, multiple function endpoints and integration of termination resistors. All of these feature enhancements contribute to significant cost savings in the system implementation and at the same time ease the implementation of advanced USB functionality into the peripherals.

Features

• Complies with the Universal Serial Bus specification Rev. 1.1
• Complies with the ACPI, OnNOW, and USB power management requirements
• Compliant with USB Human Interface Devices and Monitor Control Class
• Compliant with System Management Bus Specification Rev. 1.0
• Integrated SIE (Serial Interface Engine), FIFO memory and transceivers
• Automatic USB protocol handling
• High speed I²C Interface (up to 1 Mbit/s)
• Compatible with the PDIUSBH11 software
• Software controllable connection to USB bus (SoftConnect^TM)
• Low frequency 12 MHz crystal oscillator eases EMI design issues
• Programmable output clock frequency
• Bus powered capability with very low suspend current
• Controllable LazyClock output during suspend
• Single 3.3 V supply with 5 V tolerant I/O
• Available in 16-pin DIP and SO packages
• Full-scan design with high fault coverage (>99%) insures high quality
• Higher than 8 kV in-circuit ESD protection lowers cost of extra components

Block diagrams/pinning

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