HUB CONTROLLER FOR UNIVERSAL SERIAL BUS

DATA SHEET

MOS INTEGRATED CIRCUIT

Document No. S13918EJ3V0DS00 (3rd edition)

Date Published April 2001 NS CP(K)

Printed in Japan

The

µPD72012 is a dedicated LSI for a HUB connected to a universal serial bus (USB) system.

It is an upgrade of NEC’s

µPD72011. It complies with USB specification revision 1.1.

By putting descriptors into ROM, information such as a user’s vendor ID can be implemented in the chip.

FEATURES

Compliant with Chapter 11 (HUB Specifications) of USB Specification 1.1.

Descriptors into ROM

• The user can customize the vendor ID and product ID by using Mask ROM option.

Supports 5 kinds of string descriptors (for Mask ROM code product only)

On-chip sequencer

• There is an on-chip descriptor and request response sequencer. External initial setup and control is not needed

and HUB functions can be realized using only the

µPD72012.

Downstream ports

• Four or five ports can be selected using a pin function.

Power modes

• Bus power or self-power can be selected using a pin function (an external power control circuit is required).

Corresponds to standard descriptor products

• Two kinds of standard ROM code products are provided. Standard and HUB class descriptors are on-chip in

the

µPD72012.

ROM code: 003 (individual overcurrent monitoring type Generic HUB)

ROM code: 004 (collective overcurrent monitoring type Generic HUB)

Supports two kinds of clock input

• 48 MHz oscillator input or a 4 MHz crystal resonator can be supported

Power control

• Port power control and overcurrent detection functions are on-chip. Individual port control or collective control

can be selected for these.

ORDERING INFORMATION

Part No.

Package

µPD72012CU-XXX

42-pin plastic SDIP (15.24 mm (600))

µPD72012GB-XXX-3B4

44-pin plastic QFP (10

× 10)

1999

The information in this document is subject to change without notice. Before using this document, please

confirm that this is the latest version.

Not all devices/types available in every country. Please check with local NEC representative for

availability and additional information.

The mark

shows major revised points.