DATA SHEET
MOS INTEGRATED CIRCUIT
µ
PD72012
HUB CONTROLLER FOR UNIVERSAL SERIAL BUS
The
µ
PD72012 is a dedicated LSI for a HUB connected to a universal serial bus (USB) system.
It is an upgrade of NEC’s
µ
PD72011. 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
µ
PD72012.
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
µ
PD72012.
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
42-pin plastic SDIP (15.24 mm (600))
44-pin plastic QFP (10
×
10)
µ
PD72012CU-XXX
µ
PD72012GB-XXX-3B4
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.
Document No. S13918EJ3V0DS00 (3rd edition)
Date Published April 2001 NS CP(K)
Printed in Japan
The mark
shows major revised points.
1999
Power technology
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