NEC Electronics Announces New USB 2.0 Host and Peripheral Controller

NEC Electronics today announced an integrated USB2.0 host and peripheral controller designed to enable high-speed digital data sharing among electronic equipment such as digital camera and printer

On a single chip, the μPD720150 integrates communications functions that formerly required separate USB host and controller chips. In addition to reducing the device count and saving board space, it facilitates software development by implementing numerous functions in hardware, and features a general-purpose CPU bus interface for connections to a wide variety of embedded CPUs. As the newest product in the ECOUSB™ series, it delivers dramatically lower power consumption, both through the reduced device count and through advanced power management techniques.

The USB interface was originally designed as a convenient, standardized interface between personal computers and peripherals such as printers and keyboards. But as the standard developed, its high speed and relatively low cost made it a natural choice for a wide range of data transfer applications. For example, it is now commonly used to transfer images and video from digital cameras to other devices. Devices such as printers, which were formerly regarded as peripherals, are now often provided with USB host functions, allowing data to be transferred without connecting a computer. USB ports are also commonly used to add functionality by updating the embedded software of electronics equipment.

The μPD720150 is an ideal solution for such USB-enabled systems. In addition to enabling high-speed data transfers at rates up to 480 megabits per second (Mbps), it contributes to lower costs and space-efficient design by integrating host and peripheral control functions on a single chip, and supports rapid software development by hardware implementation of basic USB functions.

The principal features of the μPD720150 are as follows.

1. Integrated host and peripheral control functions
Register settings enable four different configuration patterns for the two USB ports, including one or two hosts, one peripheral, or one host and one peripheral. The chip supports simultaneous host and peripheral control, and the number of ports can be increased by connecting an external hub, which are also available from NEC Electronics.

2. Hardware implementation of basic USB operations
The μPD720150 features on-chip hardware to handle basic USB operations, including many operations that formerly had to be handled in software. For example, audio and video data transfers can be scheduled automatically. By taking advantage of these on-chip functions, designers can provide USB features without increasing the software development burden.

3. General-purpose CPU bus interface
The new chip integrates a 16-bit CPU interface with selectable timing modes. This allows direct connections to embedded system CPUs and eliminates the need for timing control device, for lower device counts and further savings in board space.

4. Low power consumption
Technology developed for the ECOUSB™ series of low-power USB products enables lower power consumption at standby mode, for example by completely stopping the clock when USB functions are not in use, with the ability to activate the clock in response to an external signal event. The chip integrates a regulator to reduce internal voltage from 3.3 V to 1.5 V. This lowers operating power consumption without requiring additional devices.

Please refer to the appendix for detailed specifications of the µPD720150.

Availability
The μPD720150 is available now in sample quantities. Volume production of 500,000 units per month will commence in August 2008.

 

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